1.
Laigh Milton Viaduct
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Laigh Milton Viaduct is a railway viaduct near Laigh Milton mill to the west of Gatehead in East Ayrshire, Scotland, about 5 miles west of Kilmarnock. It is probably the worlds earliest surviving railway viaduct on a railway. The viaduct was restored in 1995-96 and is a Category A listed structure since 1982 and it bridges the River Irvine which forms the boundary between East Ayrshire and South Ayrshire. It was built for the Kilmarnock and Troon Railway, opened in 1812 and this was in turn replaced by a third structure further south again, which carries trains at the present day. The first viaduct was constructed as part of the Kilmarnock and Troon Railway and it is located at National Grid Reference NS38343690. It was built with four arches of 12.3 m span, and a rise of one-third span. The railway was carried about 8 m above the river surface, the arches were of local freestone with sandstone ashlar facings and rounded cutwaters, these were later extended to form semi-circular buttresses. Built in 1811 -1812, it is the oldest surviving railway viaduct in Scotland, and one of the oldest in the world. It is about 82 m long by 5.8 m wide over all, photographs taken prior to the recent restoration show the viaduct without parapets, and there is no evidence that these were provided. The engineer for the line was William Jessop, and the resident engineer was Thomas Hollis. The stonemason was probably John Simpson, who had been employed by Jessop at Ardrossan. Paxton suggests that the standard of construction was poor, This utilitarian. It did not incorporate the hollow cross-tied spandrel improvement then being adopted with increasing frequency by leading engineers, if this had been adopted here instead of clay fill, it would have obviated the spandrel bulging and some of the stone loss that occurred. Much of the viaducts stone quality and some workmanship at the west end were only just adequate for the purpose, but the flat-stone, lime-mortar-bedded, pier hearting carried up to 1.5 m above arch springing was an effective feature which had probably saved the piers from collapse. In cross-section, the spandrels presented an application of the classic gravity retaining wall. It had become obvious that the structure was near to collapse, when it was by-passed, it remained in place, and was used as a footway and possibly for cartage to and from the pit on the west side of the river, Fairlie Colliery No.3. In 1846 the proprietors determined the need to improve their railway for ordinary locomotive use, part of this process involved easing some of the very sharp curves on the line. This process included providing a new viaduct to cross the River Irvine and this second bridge was wooden, it was located where the river banks were lower than at the first viaduct, and elevated approaches were needed
2.
Trestle bridge
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A trestle is a rigid frame used as a support, historically a tripod used both as stools and to support tables at banquets. A trestle bridge is a composed of a number of short spans supported by such frames. Since this type of bridge is called a trestle for short. Timber and iron trestles were used in the 19th century. In the 21st century, steel and sometimes concrete trestles are commonly used to bridge particularly deep valleys while timber trestles remain common in certain areas, many timber trestles were built in the 19th and early 20th centuries with the expectation that they would be temporary. Timber trestles were used to get the railroad to its destination, in the later 20th century, tools such as the earthmover made it cheaper to construct a high fill directly instead of first constructing a trestle from which to dump the fill. Timber trestles remain common in applications, most notably for bridge approaches crossing floodways. For the purposes of discharging material below, a coal trestle carried a dead-end track, one of the longest trestle spans created was for railroad traffic crossing the Great Salt Lake on the Lucin Cutoff in Utah. It was replaced by a causeway in the 1960s, and is now being salvaged for its timber. Many wooden roller coasters are built using design details similar to trestle bridges because it is so easy to make the roller coaster very high, since loads are well distributed through large portions of the structure it is also resilient to the stresses imposed. The structure also naturally leads to a certain redundancy, such wooden coasters, while limited in their path, possess a certain ride character that is appreciated by fans of the type. The Camas Prairie Railroad in northern Idaho utilized many timber trestles across the rolling Camas Prairie and in the major grade, the 1, 490-foot viaduct across Lawyers Canyon was the exception, constructed of steel and 287 feet in height. The floodway of the Bonnet Carré Spillway in St. Charles Parish, the trestles are owned by the Canadian National Railway and the Kansas City Southern Railroad. The trestles were completed in 1936, after construction of the Spillway, the trestles may be the longest wooden railroad trestles remaining in regular use in North America. These were all replaced by masonry viaducts, few timber trestles survived into the 20th century. Two that did, and which are still in use, cross the Afon Mawddach on the coast of Wales only a few miles apart, at Barmouth. The former, built in 1867, carries trains on the heavy rail Cambrian Coast Line travelling from England via Shrewsbury to the small towns on Cardigan Bay. It also carries a toll-path for pedestrians, trestles in cast- or wrought-iron were used during the 19th Century on the developing railway network in the United Kingdom
3.
Box girder bridge
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A box girder bridge is a bridge in which the main beams comprise girders in the shape of a hollow box. The box girder normally comprises either prestressed concrete, structural steel, or a composite of steel, the box is typically rectangular or trapezoidal in cross-section. Box girder bridges are used for highway flyovers and for modern elevated structures of light rail transport. Although normally the box girder bridge is a form of bridge, box girders may also be used on cable-stayed bridges. The box girder bridge was a choice during the roadbuilding expansion of the 1960s. A serious blow to use was a sequence of three serious disasters, when new bridges collapsed in 1970 and 1971. Fifty-one people were killed in these failures, leading in the UK to the formation of the Merrison Committee, most of the bridges still under construction at this time were delayed for investigation of the basic design principle. Some were abandoned and rebuilt as a different form of bridge altogether, most of those that remained as box girder bridges, such as Erskine Bridge, were either redesigned, or had additional stiffening added later. Some bridges were strengthened a few years after opening and then further strengthened years later, the Irwell Valley bridge of 1970 was strengthened in 1970 and again in 2000. If made of concrete, box girder bridges may be cast in place using falsework supports, removed after completion, box girders may also be prefabricated in a fabrication yard, then transported and emplaced using cranes. For steel box girders, the girders are normally fabricated off site and lifted into place by crane, if a composite concrete bridge deck is used, it is often cast in-place using temporary falsework supported by the steel girder. Either form of bridge may also be installed using the technique of incremental launching, under this method, gantry cranes are often used to place new segments onto the completed portions of the bridge until the bridge superstructure is completed
4.
Controlled-access highway
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A controlled-access highway is a type of highway which has been designed for high-speed vehicular traffic, with all traffic flow and ingress/egress regulated. Common English terms are freeway, motorway and expressway, other similar terms include Interstate and parkway. Some of which may be limited-access highways, although this term can refer to a class of highway with somewhat less isolation from other traffic. In countries following Vienna convention, the motorway qualification implies they are forbidden for walking or parking, a controlled-access highway provides an unhindered flow of traffic, with no traffic signals, intersections or property access. They are free of any at-grade crossings with roads, railways, or pedestrian paths. Entrances and exits to the highway are provided at interchanges by slip roads, on the controlled-access highway, opposing directions of travel are generally separated by a median strip or central reservation containing a traffic barrier or grass. Elimination of conflicts with other directions of traffic dramatically improves safety and capacity, controlled-access highways evolved during the first half of the 20th century. Italy opened its first autostrada in 1924 connecting Milan to Varese, Germany began to build its first 30-kilometre autobahn controlled-access highway without speed limits in 1932 between Cologne and Bonn. It then rapidly constructed a system of such roads in anticipation of their use in the Second World War. The first North American freeways opened in the New York City area in the 1920s, Britain, heavily influenced by the railways, did not build its first motorway, the Preston By-pass, until 1958. Most technologically advanced nations feature a network of freeways or motorways to provide high-capacity urban travel, or high-speed rural travel. Many have a national-level or even international-level system of route numbering, exit is marked with another symbol. The definitions of motorway from the OECD and PIARC are almost identical, british Standards Motorway, Limited-access dual carriageway road, not crossed on the same level by other traffic lanes, for the exclusive use of certain classes of motor vehicle. ITE Freeway, A divided major roadway with full control of access and this definition applies to toll as well as toll-free roads. Freeway A, This designates roadways with greater complexity and high traffic volumes. Usually this type of freeway will be found in areas in or near the central core. Freeway B, This designates all other divided roadways with full control of access where lighting is needed, principal arterials may cross through urban areas, serving suburban movements. The traffic is characterized by high speeds and full or partial access control, other roads leading to a principal arterial are connected to it through side collector roads
5.
Highway
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A highway is any public road or other public way on land. It is used for roads, but also includes other public roads and public tracks, It is not an equivalent term to controlled-access highway, or a translation for autobahn, autoroute. In North American and Australian English, major such as controlled-access highways or arterial roads are often state highways. Other roads may be designated county highways in the US and Ontario and these classifications refer to the level of government that maintains the roadway. In British English, highway is primarily a legal term, everyday use normally implies roads, while the legal use covers any route or path with a public right of access, including footpaths etc. The term has led to several related derived terms, including highway system, highway code, highway patrol, the term highway exists in distinction to waterway. Major highways are named and numbered by the governments that typically develop. Australias Highway 1 is the longest national highway in the world at over 14,500 km or 9,000 mi, China has the worlds largest network of highways followed closely by the United States of America. Some highways, like the Pan-American Highway or the European routes, some major highway routes include ferry services, such as U. S. Route 10, which crosses Lake Michigan. Traditionally highways were used by people on foot or on horses, later they also accommodated carriages, bicycles and eventually motor cars, facilitated by advancements in road construction. In the 1920s and 1930s, many nations began investing heavily in progressively more modern highway systems to spur commerce and these features are typically present on highways built as motorways. The general legal definition deals with right of use not the form of construction, the status of highway on most older roads has been gained by established public use while newer roads are typically dedicated as highways from the time they are adopted. In England and Wales, a highway is also known as The Queens Highway. The core definition of a highway is modified in various legislation for a number of purposes, scots law is similar to English law with regard to highways but with differing terminology and legislation. What is defined in England as a highway will often in Scotland be what is defined by s, Highways generally have a route number designated by the state and federal departments of transportation. Smaller roads may be termed byways, modern highway systems developed in the 20th century as the automobile gained popularity. The worlds first limited access road was constructed on Long Island New York in the United States known as the Long Island Motor Parkway or the Vanderbilt Motor Parkway, construction of the Bonn–Cologne autobahn began in 1929 and was opened in 1932 by the mayor of Cologne, Konrad Adenauer. In the USA, the Federal Aid Highway Act of 1921 enacted a fund to create a highway system
6.
Street
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A street is a public thoroughfare in a built environment. It is a parcel of land adjoining buildings in an urban context, on which people may freely assemble, interact. A street can be as simple as a patch of dirt. Portions may also be smoothed with asphalt, embedded with rails, originally the word street simply meant a paved road. Examples of streets include pedestrian streets, alleys, and city-centre streets too crowded for road vehicles to pass, conversely, highways and motorways are types of roads, but few would refer to them as streets. The word street has its origins in the Latin strata, it is related to stratum. Ancient Greek stratos means army, Greeks originally built roads to move their armies, old English applied the word to Roman roads in Britain such as Ermine Street, Watling Street, etc. Later it acquired a meaning of straggling village, which were often laid out on the verges of Roman roads. In the Middle Ages, a road was a way people travelled, the street is a public easement, one of the few shared between all sorts of people. As a component of the environment as ancient as human habitation. Its roles are as numerous and diverse as its ever-changing cast of characters, streets can be loosely categorized as main streets and side streets. Main streets are usually broad with a high level of activity. Commerce and public interaction are more visible on main streets, side streets are quieter, often residential in use and character, and may be used for vehicular parking. Circulation, or less broadly, transportation, is perhaps a streets most visible use, the unrestricted movement of people and goods within a city is essential to its commerce and vitality, and streets provide the physical space for this activity. In the interest of order and efficiency, an effort may be made to different types of traffic. Le Corbusier, for one, perceived an ever-stricter segregation of traffic as an affirmation of social order—a desirable. To this end, proposals were advanced to build vertical streets where vehicles, pedestrians. Such an arrangement, it was said, would allow for denser development in the future
7.
Rail transport
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Rail transport is a means of conveyance of passengers and goods on wheeled vehicles running on rails, also known as tracks. It is also referred to as train transport. In contrast to road transport, where vehicles run on a flat surface. Tracks usually consist of rails, installed on ties and ballast, on which the rolling stock, usually fitted with metal wheels. Other variations are possible, such as slab track, where the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a transport system generally encounters lower frictional resistance than road vehicles, so passenger. The operation is carried out by a company, providing transport between train stations or freight customer facilities. Power is provided by locomotives which either draw electric power from a railway system or produce their own power. Most tracks are accompanied by a signalling system, Railways are a safe land transport system when compared to other forms of transport. The oldest, man-hauled railways date back to the 6th century BC, with Periander, one of the Seven Sages of Greece, Rail transport blossomed after the British development of the steam locomotive as a viable source of power in the 19th centuries. With steam engines, one could construct mainline railways, which were a key component of the Industrial Revolution, also, railways reduced the costs of shipping, and allowed for fewer lost goods, compared with water transport, which faced occasional sinking of ships. The change from canals to railways allowed for markets in which prices varied very little from city to city. In the 1880s, electrified trains were introduced, and also the first tramways, starting during the 1940s, the non-electrified railways in most countries had their steam locomotives replaced by diesel-electric locomotives, with the process being almost complete by 2000. During the 1960s, electrified high-speed railway systems were introduced in Japan, other forms of guided ground transport outside the traditional railway definitions, such as monorail or maglev, have been tried but have seen limited use. The history of the growth, decline and restoration to use of transport can be divided up into several discrete periods defined by the principal means of motive power used. The earliest evidence of a railway was a 6-kilometre Diolkos wagonway, trucks pushed by slaves ran in grooves in limestone, which provided the track element. The Diolkos operated for over 600 years, Railways began reappearing in Europe after the Dark Ages. The earliest known record of a railway in Europe from this period is a window in the Minster of Freiburg im Breisgau in Germany
8.
Reinforced concrete
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The reinforcement is usually, though not necessarily, steel reinforcing bars and is usually embedded passively in the concrete before the concrete sets. Reinforcing schemes are designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made of steel, Reinforced concrete may also be permanently stressed, so as to improve the behaviour of the final structure under working loads. In the United States, the most common methods of doing this are known as pre-tensioning and post-tensioning, durability in the concrete environment, irrespective of corrosion or sustained stress for example. François Coignet was a French industrialist of the century, a pioneer in the development of structural. Coignet was the first to use iron-reinforced concrete as a technique for constructing building structures, in 1853 Coignet built the first iron reinforced concrete structure, a four story house at 72 rue Charles Michels in the suburbs of Paris. Coignets descriptions of reinforcing concrete suggests that he did not do it for means of adding strength to the concrete, in 1854, English builder William B. Wilkinson reinforced the concrete roof and floors in the two-storey house he was constructing. His positioning of the reinforcement demonstrated that, unlike his predecessors, in 1877, Monier was granted another patent for a more advanced technique of reinforcing concrete columns and girders with iron rods placed in a grid pattern. Though Monier undoubtedly knew reinforcing concrete would improve its inner cohesion, before 1877 the use of concrete construction, though dating back to the Roman Empire and reintroduced in the mid to late 1800s, was not yet a proven scientific technology. His work played a role in the evolution of concrete construction as a proven. Without Hyatts work, more dangerous trial and error methods would have largely depended on for the advancement in the technology. G. A. Wayss was a German civil engineer and a pioneer of the iron, in 1879 Wayss bought the German rights to Moniers patents and in 1884 started the first commercial use for reinforced concrete in his firm Wayss & Freytag. Up until the 1890s Wayss and his firm greatly contributed to the advancement of Moniers system of reinforcing, ernest L. Ransome was an English-born engineer and early innovator of the reinforced concrete techniques in the end of the 19th century. With the knowledge of reinforced concrete developed during the previous 50 years, ransomes key innovation was to twist the reinforcing steel bar improving bonding with the concrete. Gaining increasing fame from his concrete constructed buildings Ransome was able to build two of the first reinforced concrete bridges in North America, one of the first concrete buildings constructed in the United States, was a private home, designed by William Ward in 1871. The home was designed to be fireproof for his wife, one of the first skyscrapers made with reinforced concrete was the 16-storey Ingalls Building in Cincinnati, constructed in 1904. Many different types of structures and components of structures can be built using reinforced concrete including slabs, walls, beams, columns, foundations, frames, Reinforced concrete can be classified as precast or cast-in-place concrete. Designing and implementing the most efficient floor system is key to creating optimal building structures, small changes in the design of a floor system can have significant impact on material costs, construction schedule, ultimate strength, operating costs, occupancy levels and end use of a building
9.
Prestressed concrete
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Prestressed concrete is a concrete construction material which is placed under compression prior to it supporting any applied loads. A more technical definition is Structural concrete in which stresses have been introduced to reduce potential tensile stresses in the concrete resulting from loads. This compression is produced by the tensioning of high-strength tendons located within or adjacent to the concrete volume, tendons may consist of single wires, multi-wire strands or threaded bars, and are most commonly made from high-tensile steels, carbon fibre or aramid fibre. This can result in improved structural capacity and/or serviceability compared to reinforced concrete in many situations. Typical applications range through high-rise buildings, residential slabs, foundation systems, bridge and dam structures, silos and tanks, industrial pavements, first used in the late-nineteenth century, prestressed concrete has developed to encompass a wide range of technologies. Tensioning of the tendons may be undertaken either before or after the concrete itself is cast, tendons may be located either within the concrete volume, or wholly outside of it. Whereas pre-tensioned concrete by definition uses tendons directly bonded to the concrete, pre-tensioned concrete is a variant of prestressed concrete where the tendons are tensioned prior to the concrete being cast. Pre-tensioning is a common technique, where the resulting concrete element is manufactured remotely from the final structure location. It requires strong, stable end-anchorage points between which the tendons are stretched and these anchorages form the ends of a casting bed which may be many times the length of the concrete element being fabricated. Higher bond strength in early-age concrete allows more economical fabrication as it speeds production, to promote this, pre-tensioned tendons are usually composed of isolated single wires or strands, as this provides a greater surface area for bond action than bundled strand tendons. Unlike those of post-tensioned concrete, the tendons of pre-tensioned concrete elements generally form straight lines between end-anchorages, where profiled or harped tendons are required, one or more intermediate deviators are located between the ends of the tendon to hold the tendon to the desired non-linear alignment during tensioning. Such deviators usually act against substantial forces, and hence require a robust casting bed foundation system, pre-tensioned concrete is most commonly used for the fabrication of structural beams, floor slabs, hollow-core planks, balconies, lintels, driven piles, water tanks and concrete pipes. Post-tensioned concrete is a variant of prestressed concrete where the tendons are tensioned after the concrete structure has been cast. The tendons are not placed in contact with the concrete. At each end of a tendon is an anchorage assembly firmly fixed to the surrounding concrete, once the concrete has been cast and set, the tendons are tensioned by pulling the tendon ends through the anchorages while pressing against the concrete. The large forces required to tension the tendons result in a significant permanent compression being applied to the once the tendon is locked-off at the anchorage. Casting the tendon ducts/sleeves into the concrete before any tensioning occurs allows them to be profiled to any desired shape including incorporating vertical and/or horizontal curvature. Bonded post-tensioning has prestressing tendons permanently bonded to the concrete by the in situ grouting of their encapsulating ducting following tendon tensioning
10.
Masonry
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Masonry is the building of structures from individual units, which are often laid in and bound together by mortar, the term masonry can also refer to the units themselves. The common materials of construction are brick, building stone such as marble, granite, travertine, and limestone, cast stone, concrete block, glass block. Masonry is generally a durable form of construction. However, the used, the quality of the mortar and workmanship. A person who constructs masonry is called a mason or bricklayer, Masonry is commonly used for walls and buildings. Brick and concrete block are the most common types of masonry in use in industrialized nations, Concrete blocks, especially those with hollow cores, offer various possibilities in masonry construction. They generally provide great strength, and are best suited to structures with light transverse loading when the cores remain unfilled. Filling some or all of the cores with concrete or concrete with steel reinforcement offers much greater tensile, the use of material such as bricks and stones can increase the thermal mass of a building and can protect the building from fire. Masonry walls are resistant to projectiles, such as debris from hurricanes or tornadoes. Extreme weather, under circumstances, can cause degradation of masonry due to expansion. Masonry tends to be heavy and must be built upon a foundation, such as reinforced concrete. Other than concrete, masonry construction does not lend well to mechanization. Masonry consists of components and has a low tolerance to oscillation as compared to other materials such as reinforced concrete, plastics, wood. Masonry has high compressive strength under vertical loads but has low tensile strength unless reinforced, the tensile strength of masonry walls can be increased by thickening the wall, or by building masonry piers at intervals. Where practical, steel reinforcements such as windposts can be added, a masonry veneer wall consists of masonry units, usually clay-based bricks, installed on one or both sides of a structurally independent wall usually constructed of wood or masonry. In this context the brick masonry is primarily decorative, not structural, the brick veneer is generally connected to the structural wall by brick ties. There is typically an air gap between the veneer and the structural wall. Concrete blocks, real and cultured stones, and veneer adobe are sometimes used in a very similar veneer fashion
11.
Falsework
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This usage is specifically called centering. The British Standards of practice for falsework, BS5975,1982, until the turn of the 20th century almost all falsework was constructed from timber. To compensate for shortages in different regions and to rationalize labor and material usage. The major developments include the design of devices, transitions to other spanning beams such as steel pipes or profiles or reusable timber beams. During the same period many different scaffolding systems were being developed around the world and these consisted of welded frames that could be slotted or clipped together to form access or support towers. The reduction in time and complexity led to reduced labor costs. Further developments have made scaffolding systems even easier to use, stronger systems have been introduced that either incorporate horizontal restraints at more levels or use stronger tubes or connections. Materials from which falsework systems are manufactured have also diversified from traditional steel, in the UK, BS5975 gives recommendations for the design and use of falsework on construction sites. It was first introduced by the British Standards Institute in March 1982 and was revised in March 1996. The code is currently under revision again, a copy was released in late 2007. Fabrication, Metalworkers fabricate a falsework section from pipe and beams, erection, A section is lifted to a vertical position with the assistance of two forklift operators. Placement, The section is guided into position by a ground crew, completed Falsework, Decking and some formwork has been added. When the supports are complete, wood beams and plywood or reusable metal forms will be placed, reinforcing and tenon conduits added, after curing and any tenon tensioning, wedges will be removed and forms and falsework disassembled. A certain type of bridge, the suspension bridge, must be supported during construction
12.
Bridge
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A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that each serve a particular purpose, the Oxford English Dictionary traces the origin of the word bridge to an Old English word brycg, of the same meaning. The word can be traced back to Proto-Indo-European *bʰrēw-. The word for the game of the same name has a different origin. The first bridges made by humans were probably spans of cut wooden logs or planks and eventually stones, using a simple support, some early Americans used trees or bamboo poles to cross small caverns or wells to get from one place to another. Dating to the Greek Bronze Age, it is one of the oldest arch bridges still in existence, several intact arched stone bridges from the Hellenistic era can be found in the Peloponnese. The greatest bridge builders of antiquity were the ancient Romans, the Romans built arch bridges and aqueducts that could stand in conditions that would damage or destroy earlier designs. An example is the Alcántara Bridge, built over the river Tagus, the Romans also used cement, which reduced the variation of strength found in natural stone. One type of cement, called pozzolana, consisted of water, lime, sand, brick and mortar bridges were built after the Roman era, as the technology for cement was lost. In India, the Arthashastra treatise by Kautilya mentions the construction of dams, a Mauryan bridge near Girnar was surveyed by James Princep. The bridge was swept away during a flood, and later repaired by Puspagupta, the use of stronger bridges using plaited bamboo and iron chain was visible in India by about the 4th century. A number of bridges, both for military and commercial purposes, were constructed by the Mughal administration in India and this bridge is also historically significant as it is the worlds oldest open-spandrel stone segmental arch bridge. European segmental arch bridges date back to at least the Alconétar Bridge, rope bridges, a simple type of suspension bridge, were used by the Inca civilization in the Andes mountains of South America, just prior to European colonization in the 16th century. During the 18th century there were innovations in the design of timber bridges by Hans Ulrich Grubenmann, Johannes Grubenmann. The first book on bridge engineering was written by Hubert Gautier in 1716, a major breakthrough in bridge technology came with the erection of the Iron Bridge in Shropshire, England in 1779. It used cast iron for the first time as arches to cross the river Severn, with the Industrial Revolution in the 19th century, truss systems of wrought iron were developed for larger bridges, but iron does not have the tensile strength to support large loads. With the advent of steel, which has a tensile strength, much larger bridges were built. In 1927 welding pioneer Stefan Bryła designed the first welded bridge in the world
13.
Flyover (road)
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An overpass is a bridge, road, railway or similar structure that crosses over another road or railway. An overpass and underpass together form a grade separation, Stack interchanges are made up of many overpasses. The worlds first railroad flyover was constructed in 1843 by the London and Croydon Railway at Norwood Junction railway station to carry its atmospheric railway vehicles over the Brighton Main Line, the first flyover in India was opened on 14 April 1965 at Kemps Corner in Mumbai. The 48-foot-long bridge was constructed in seven months by Shirish Patel at a cost of ₹17.5 lakh. In North American usage, a flyover is an overpass, built above main overpass lanes. Traffic engineers usually refer to the latter as a grade separation, a cloverleaf or partial cloverleaf contains some 270 degree loops, which can slow traffic and can be difficult to construct with multiple lanes. Where all such turns are replaced with flyovers only 90 degree turns are needed, depending upon design, traffic may flow in all directions at or near open road speeds. For more examples see Freeway interchange, a pedestrian overpass allows pedestrians safe crossing over busy roads without impacting traffic. Railway overpasses are used to level crossings as a safer alternative. Using overpasses allows for unobstructed rail traffic to flow without conflicting with vehicular, rapid transit systems use complete grade separation of their rights of way to avoid traffic interference with frequent and reliable service. Railroads also use balloon loops and flying instead of flat junctions, as a way to reverse direction. Footbridge Skyway Stack interchange Viaduct Overpass at Encyclopædia Britannica
14.
Flying junction
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A more technical term is grade-separated junction. A burrowing junction or dive-under occurs where the line passes below the main line. The alternative to separation is a level junction or flat junction, where tracks cross at grade. Where two lines each of two tracks merge with a junction, they can become a four-track railway together. This happens regularly in the Netherlands, nearly all junctions with high-speed railways are grade-separated. The LGV network has four grade-separated high-speed triangles, Fretin, Coubert, Massy, a fifth, Vémars, is grade separated except for a single-track link on the least-used side, linking Paris Gare du Nord and Paris CDG airport. Triangle des Angles, Avignon, with two parallel 1.5 km viaducts, triangle de Massy, Paris, partial four-way junction. Before conversion to a junction, this was the site of the Harmelen train disaster. In addition, lead tracks to Cabot Yard maintenance facilities branch off from the junction, all were built by the former Pennsylvania Railroad and are now maintained by Amtrak. 39. 97086°N75. 19848°W /39.97086, -75.19848 on the New York City Subway at Hammels Wye on the IND Rockaway Line, the grade separations of the junction are woven into the grade separations of the interchange between the two highways. This would have part of the Oklahoma Avenue station, had it been built. South of the King Street station in Alexandria is a series of tunnels where the Blue, there are also flying junctions near three underground rail stations, Rosslyn, LEnfant Plaza, and the Pentagon
15.
Romance languages
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Today, around 800 million people are native speakers worldwide, mainly in Europe, Africa and the Americas, but also elsewhere. Additionally, the major Romance languages have many speakers and are in widespread use as lingua francas. This is especially the case for French, which is in use throughout Central and West Africa, Madagascar, Mauritius. The five most widely spoken Romance languages by number of speakers are Spanish, Portuguese, French, Italian. Because of the difficulty of imposing boundaries on a continuum, various counts of the modern Romance languages are given, for example, Dalby lists 23 based on mutual intelligibility. Between 350 BC and 150 AD, the expansion of the Empire, together with its administrative and educational policies, Latin also exerted a strong influence in southeastern Britain, the Roman province of Africa, western Germany and the Balkans north of the Jireček Line. Despite other influences, the phonology, morphology, and lexicon of all Romance languages consist mainly of evolved forms of Vulgar Latin, however, some notable differences occur between todays Romance languages and their Roman ancestor. With only one or two exceptions, Romance languages have lost the system of Latin and, as a result, have SVO sentence structure. From this adverb the noun romance originated, which applied initially to anything written romanice, the word romance with the modern sense of romance novel or love affair has the same origin. In the medieval literature of Western Europe, serious writing was usually in Latin, while popular tales, often focusing on love, were composed in the vernacular, for example, the Portuguese word fresta is descended from Latin fenestra window, but now means skylight and slit. Cognates may exist but have become rare, such as finiestra in Spanish, the Spanish and Portuguese terms defenestrar meaning to throw through a window and fenestrado meaning replete with windows also have the same root, but are later borrowings from Latin. Galician has both fiestra and the frequently used ventá and xanela. As an alternative to lei, Italian has the pronoun ella, a cognate of the words for she. Sardinian balcone comes from Old Italian and is similar to other Romance languages such as French balcon, Portuguese balcão, Romanian balcon, Spanish balcón, Catalan balcó and Corsican balconi. Documentary evidence is limited about Vulgar Latin for the purposes of research. Many of its speakers were soldiers, slaves, displaced peoples, other scholars argue that the distinctions are more rightly viewed as indicative of sociolinguistic and register differences normally found within any language. Both were mutually intelligible as one and the language, which was true until the second half of the 7th century. Central Europe and the Balkans were occupied by the Germanic and Slavic tribes, as well as by the Huns, over the course of the fourth to eighth centuries, Vulgar Latin, by this time highly dialectalized, broke up into discrete languages that were no longer mutually intelligible
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Latin
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Latin is a classical language belonging to the Italic branch of the Indo-European languages. The Latin alphabet is derived from the Etruscan and Greek alphabets, Latin was originally spoken in Latium, in the Italian Peninsula. Through the power of the Roman Republic, it became the dominant language, Vulgar Latin developed into the Romance languages, such as Italian, Portuguese, Spanish, French, and Romanian. Latin, Italian and French have contributed many words to the English language, Latin and Ancient Greek roots are used in theology, biology, and medicine. By the late Roman Republic, Old Latin had been standardised into Classical Latin, Vulgar Latin was the colloquial form spoken during the same time and attested in inscriptions and the works of comic playwrights like Plautus and Terence. Late Latin is the language from the 3rd century. Later, Early Modern Latin and Modern Latin evolved, Latin was used as the language of international communication, scholarship, and science until well into the 18th century, when it began to be supplanted by vernaculars. Ecclesiastical Latin remains the language of the Holy See and the Roman Rite of the Catholic Church. Today, many students, scholars and members of the Catholic clergy speak Latin fluently and it is taught in primary, secondary and postsecondary educational institutions around the world. The language has been passed down through various forms, some inscriptions have been published in an internationally agreed, monumental, multivolume series, the Corpus Inscriptionum Latinarum. Authors and publishers vary, but the format is about the same, volumes detailing inscriptions with a critical apparatus stating the provenance, the reading and interpretation of these inscriptions is the subject matter of the field of epigraphy. The works of several hundred ancient authors who wrote in Latin have survived in whole or in part and they are in part the subject matter of the field of classics. The Cat in the Hat, and a book of fairy tales, additional resources include phrasebooks and resources for rendering everyday phrases and concepts into Latin, such as Meissners Latin Phrasebook. The Latin influence in English has been significant at all stages of its insular development. From the 16th to the 18th centuries, English writers cobbled together huge numbers of new words from Latin and Greek words, dubbed inkhorn terms, as if they had spilled from a pot of ink. Many of these words were used once by the author and then forgotten, many of the most common polysyllabic English words are of Latin origin through the medium of Old French. Romance words make respectively 59%, 20% and 14% of English, German and those figures can rise dramatically when only non-compound and non-derived words are included. Accordingly, Romance words make roughly 35% of the vocabulary of Dutch, Roman engineering had the same effect on scientific terminology as a whole
17.
Ancient Rome
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In its many centuries of existence, the Roman state evolved from a monarchy to a classical republic and then to an increasingly autocratic empire. Through conquest and assimilation, it came to dominate the Mediterranean region and then Western Europe, Asia Minor, North Africa and it is often grouped into classical antiquity together with ancient Greece, and their similar cultures and societies are known as the Greco-Roman world. Ancient Roman civilisation has contributed to modern government, law, politics, engineering, art, literature, architecture, technology, warfare, religion, language and society. Rome professionalised and expanded its military and created a system of government called res publica, the inspiration for modern republics such as the United States and France. By the end of the Republic, Rome had conquered the lands around the Mediterranean and beyond, its domain extended from the Atlantic to Arabia, the Roman Empire emerged with the end of the Republic and the dictatorship of Augustus Caesar. 721 years of Roman-Persian Wars started in 92 BC with their first war against Parthia and it would become the longest conflict in human history, and have major lasting effects and consequences for both empires. Under Trajan, the Empire reached its territorial peak, Republican mores and traditions started to decline during the imperial period, with civil wars becoming a prelude common to the rise of a new emperor. Splinter states, such as the Palmyrene Empire, would divide the Empire during the crisis of the 3rd century. Plagued by internal instability and attacked by various migrating peoples, the part of the empire broke up into independent kingdoms in the 5th century. This splintering is a landmark historians use to divide the ancient period of history from the pre-medieval Dark Ages of Europe. King Numitor was deposed from his throne by his brother, Amulius, while Numitors daughter, Rhea Silvia, because Rhea Silvia was raped and impregnated by Mars, the Roman god of war, the twins were considered half-divine. The new king, Amulius, feared Romulus and Remus would take back the throne, a she-wolf saved and raised them, and when they were old enough, they returned the throne of Alba Longa to Numitor. Romulus became the source of the citys name, in order to attract people to the city, Rome became a sanctuary for the indigent, exiled, and unwanted. This caused a problem for Rome, which had a large workforce but was bereft of women, Romulus traveled to the neighboring towns and tribes and attempted to secure marriage rights, but as Rome was so full of undesirables they all refused. Legend says that the Latins invited the Sabines to a festival and stole their unmarried maidens, leading to the integration of the Latins, after a long time in rough seas, they landed at the banks of the Tiber River. Not long after they landed, the men wanted to take to the sea again, one woman, named Roma, suggested that the women burn the ships out at sea to prevent them from leaving. At first, the men were angry with Roma, but they realized that they were in the ideal place to settle. They named the settlement after the woman who torched their ships, the Roman poet Virgil recounted this legend in his classical epic poem the Aeneid
18.
Aqueduct (bridge)
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Bridges for conveying water, called aqueducts or water bridges are constructed to convey watercourses across gaps such as valleys or ravines. The term aqueduct may also be used to refer to the entire watercourse, large navigable aqueducts are used as transport links for boats or ships. Aqueducts must span a crossing at the level as the watercourses on each end. The word is derived from the Latin aqua and ducere, a modern version of an aqueduct is a pipeline bridge. Although particularly associated with the Romans, aqueducts were likely first used by the Minoans around 2000 BCE, the Minoans had developed what was then an extremely advanced irrigation system, including several aqueducts. In the seventh century BCE, the Assyrians built an 80 km long limestone aqueduct, roman aqueducts set a standard of engineering that was not surpassed for more than a thousand years. Navigable aqueducts, also called water bridges, are water-filled bridges to allow vessels on a waterway to cross ravines or valleys, during the Industrial Revolution of the 18th century, navigable aqueducts were constructed as part of the boom in canal-building. A notable revolving aqueduct has been made on the Bridgewater Canal and this allowed vessels to cross at high and low levels while conserving water.3 km long and featuring 74 arches Aqueduct of Zacatecas, Zacatecas. F
19.
Roman aqueduct
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The Romans constructed numerous aqueducts in order to bring water from often distant sources into cities and towns, supplying public baths, latrines, fountains and private households. Aqueducts also provided water for mining operations, milling, farms, Aqueducts moved water through gravity alone, along a slight downward gradient within conduits of stone, brick or concrete. Most conduits were buried beneath the ground, and followed the contours of the terrain, obstructing peaks were circumvented or, less often, tunneled through. Where valleys or lowlands intervened, the conduit was carried on bridgework, or its contents fed into high-pressure lead, ceramic or stone pipes, most aqueduct systems included sedimentation tanks, which helped reduce any water-borne debris. Sluices and castella aquae regulated the supply to individual destinations, the run-off water from aqueducts drove urban water-mills, and scoured the drains and sewers. Romes first aqueduct supplied a water fountain sited at the cattle market. By the 3rd century AD, the city had aqueducts, sustaining a population of over a million in a water-extravagant economy. Most Roman aqueducts proved reliable, and durable, some were maintained into the modern era. Methods of aqueduct surveying and construction are noted by Vitruvius in his work De Architectura, the general Frontinus gives more detail in his official report on the problems, uses and abuses of Imperial Romes public water supply. Notable examples of architecture include the supporting piers of the Aqueduct of Segovia. The reliance of ancient communities upon such water resources restricted their potential growth, by the early Imperial era, the citys aqueducts supported a population of over a million, and an extravagant water supply for public amenities had become a fundamental part of Roman life. The run-off of aqueduct water scoured the sewers of cities and towns, Water from aqueducts was also used to supply villas, ornamental urban and suburban gardens, market gardens, farms and agricultural estates, the latter being the core of Romes economy and wealth. Rome had several springs within its perimeter walls but its groundwater was notoriously unpalatable, water from the river Tiber was badly affected by pollution and waterborne diseases. The citys demand for water had probably exceeded its local supplies by 312 BC, when the citys first aqueduct. The Aqua Appia was one of two major projects of the time, the other was a military road between Rome and Capua, the first leg of the so-called Appian Way. Both projects had significant strategic value, as the Third Samnite War had been under way for thirty years by that point. The road allowed rapid troop movements, and by design or fortunate coincidence, most of the Aqua Appia ran within a buried conduit and it was fed by a spring 16. A second aqueduct, the Aqua Anio Vetus, was commissioned some forty years later and its flow was more than twice that of the Aqua Appia, and it entered the city on raised arches, supplying water to higher elevations of the city
20.
Ancient history
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Ancient history is the aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly 5,000 years, beginning with Sumerian Cuneiform script, the term classical antiquity is often used to refer to history in the Old World from the beginning of recorded Greek history in 776 BC. This roughly coincides with the date of the founding of Rome in 753 BC, the beginning of the history of ancient Rome. In India, ancient history includes the period of the Middle Kingdoms, and, in China. Historians have two major avenues which they take to better understand the ancient world, archaeology and the study of source texts, primary sources are those sources closest to the origin of the information or idea under study. Primary sources have been distinguished from secondary sources, which cite, comment on. Archaeology is the excavation and study of artefacts in an effort to interpret, archaeologists excavate the ruins of ancient cities looking for clues as to how the people of the time period lived. The study of the ancient cities of Harappa, Mohenjo-daro, the city of Pompeii, an ancient Roman city preserved by the eruption of a volcano in AD79. Its state of preservation is so great that it is a window into Roman culture and provided insight into the cultures of the Etruscans. The Terracotta Army, the mausoleum of the First Qin Emperor in ancient China, the discovery of Knossos by Minos Kalokairinos and Sir Arthur Evans. The discovery of Troy by Heinrich Schliemann, most of what is known of the ancient world comes from the accounts of antiquitys own historians. Although it is important to take account the bias of each ancient author. Some of the more notable ancient writers include Herodotus, Thucydides, Arrian, Plutarch, Polybius, Sima Qian, Sallust, Livy, Josephus, Suetonius, furthermore, the reliability of the information obtained from these surviving records must be considered. Few people were capable of writing histories, as literacy was not widespread in almost any culture until long after the end of ancient history, the earliest known systematic historical thought emerged in ancient Greece, beginning with Herodotus of Halicarnassus. He was also the first to distinguish between cause and immediate origins of an event, the Roman Empire was one of the ancient worlds most literate cultures, but many works by its most widely read historians are lost. Indeed, only a minority of the work of any major Roman historian has survived, prehistory is the period before written history. The early human migrations in the Lower Paleolithic saw Homo erectus spread across Eurasia 1.8 million years ago, the controlled use of fire occurred 800,000 years ago in the Middle Paleolithic. 250,000 years ago, Homo sapiens emerged in Africa, 60–70,000 years ago, Homo sapiens migrated out of Africa along a coastal route to South and Southeast Asia and reached Australia
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Chicago
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Chicago, officially the City of Chicago, is the third-most populous city in the United States. With over 2.7 million residents, it is the most populous city in the state of Illinois, and it is the county seat of Cook County. In 2012, Chicago was listed as a global city by the Globalization and World Cities Research Network. Chicago has the third-largest gross metropolitan product in the United States—about $640 billion according to 2015 estimates, the city has one of the worlds largest and most diversified economies with no single industry employing more than 14% of the workforce. In 2016, Chicago hosted over 54 million domestic and international visitors, landmarks in the city include Millennium Park, Navy Pier, the Magnificent Mile, Art Institute of Chicago, Museum Campus, the Willis Tower, Museum of Science and Industry, and Lincoln Park Zoo. Chicagos culture includes the arts, novels, film, theater, especially improvisational comedy. Chicago also has sports teams in each of the major professional leagues. The city has many nicknames, the best-known being the Windy City, the name Chicago is derived from a French rendering of the Native American word shikaakwa, known to botanists as Allium tricoccum, from the Miami-Illinois language. The first known reference to the site of the current city of Chicago as Checagou was by Robert de LaSalle around 1679 in a memoir, henri Joutel, in his journal of 1688, noted that the wild garlic, called chicagoua, grew abundantly in the area. In the mid-18th century, the area was inhabited by a Native American tribe known as the Potawatomi, the first known non-indigenous permanent settler in Chicago was Jean Baptiste Point du Sable. Du Sable was of African and French descent and arrived in the 1780s and he is commonly known as the Founder of Chicago. In 1803, the United States Army built Fort Dearborn, which was destroyed in 1812 in the Battle of Fort Dearborn, the Ottawa, Ojibwe, and Potawatomi tribes had ceded additional land to the United States in the 1816 Treaty of St. Louis. The Potawatomi were forcibly removed from their land after the Treaty of Chicago in 1833, on August 12,1833, the Town of Chicago was organized with a population of about 200. Within seven years it grew to more than 4,000 people, on June 15,1835, the first public land sales began with Edmund Dick Taylor as U. S. The City of Chicago was incorporated on Saturday, March 4,1837, as the site of the Chicago Portage, the city became an important transportation hub between the eastern and western United States. Chicagos first railway, Galena and Chicago Union Railroad, and the Illinois, the canal allowed steamboats and sailing ships on the Great Lakes to connect to the Mississippi River. A flourishing economy brought residents from rural communities and immigrants from abroad, manufacturing and retail and finance sectors became dominant, influencing the American economy. The Chicago Board of Trade listed the first ever standardized exchange traded forward contracts and these issues also helped propel another Illinoisan, Abraham Lincoln, to the national stage
22.
Atlanta
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Atlanta is the capital of and the most populous city in the U. S. state of Georgia, with an estimated 2015 population of 463,878. Atlanta is the cultural and economic center of the Atlanta metropolitan area, home to 5,710,795 people, Atlanta is the county seat of Fulton County, and a small portion of the city extends eastward into DeKalb County. In 1837, Atlanta was founded at the intersection of two lines, and the city rose from the ashes of the American Civil War to become a national center of commerce. Atlantas economy is considered diverse, with dominant sectors that include logistics, professional and business services, media operations, Atlanta has topographic features that include rolling hills and dense tree coverage. Revitalization of Atlantas neighborhoods, initially spurred by the 1996 Olympics in Atlanta, has intensified in the 21st century, altering the demographics, politics. Prior to the arrival of European settlers in north Georgia, Creek Indians inhabited the area, standing Peachtree, a Creek village located where Peachtree Creek flows into the Chattahoochee River, was the closest Indian settlement to what is now Atlanta. As part of the removal of Native Americans from northern Georgia from 1802 to 1825, the Creek ceded the area in 1821. In 1836, the Georgia General Assembly voted to build the Western, the initial route was to run southward from Chattanooga to a terminus east of the Chattahoochee River, which would then be linked to Savannah. After engineers surveyed various possible locations for the terminus, the zero milepost was driven into the ground in what is now Five Points. A year later, the area around the milepost had developed into a settlement, first known as Terminus, and later as Thrasherville after a merchant who built homes. By 1842, the town had six buildings and 30 residents and was renamed Marthasville to honor the Governors daughter, later, J. Edgar Thomson, Chief Engineer of the Georgia Railroad, suggested the town be renamed Atlantica-Pacifica, which was shortened to Atlanta. The residents approved, and the town was incorporated as Atlanta on December 29,1847, by 1860, Atlantas population had grown to 9,554. During the American Civil War, the nexus of multiple railroads in Atlanta made the city a hub for the distribution of military supplies, in 1864, the Union Army moved southward following the capture of Chattanooga and began its invasion of north Georgia. On the next day, Mayor James Calhoun surrendered Atlanta to the Union Army, on November 11,1864, Sherman prepared for the Union Armys March to the Sea by ordering Atlanta to be burned to the ground, sparing only the citys churches and hospitals. After the Civil War ended in 1865, Atlanta was gradually rebuilt, due to the citys superior rail transportation network, the state capital was moved from Milledgeville to Atlanta in 1868. In the 1880 Census, Atlanta surpassed Savannah as Georgias largest city, by 1885, the founding of the Georgia School of Technology and the citys black colleges had established Atlanta as a center for higher education. In 1895, Atlanta hosted the Cotton States and International Exposition, during the first decades of the 20th century, Atlanta experienced a period of unprecedented growth. In three decades time, Atlantas population tripled as the city expanded to include nearby streetcar suburbs
23.
Birmingham
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Birmingham is a major city and metropolitan borough of West Midlands, England lying on the River Rea, a small river that runs through Birmingham. It is the largest and most populous British city outside London, the city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birminghams metropolitan area is the second most populous in the UK with a population of 3.8 million and this also makes Birmingham the 8th most populous metropolitan area in Europe. By 1791 it was being hailed as the first manufacturing town in the world, perhaps the most important invention in British history, the industrial steam engine, was invented in Birmingham. From the summer of 1940 to the spring of 1943, Birmingham was bombed heavily by the German Luftwaffe in what is known as the Birmingham Blitz. The damage done to the infrastructure, in addition to a deliberate policy of demolition and new building by planners, led to extensive demolition. Today Birminghams economy is dominated by the service sector and its metropolitan economy is the second largest in the United Kingdom with a GDP of $121. 1bn, and its six universities make it the largest centre of higher education in the country outside London. Birmingham is the fourth-most visited city in the UK by foreign visitors, Birminghams sporting heritage can be felt worldwide, with the concept of the Football League and lawn tennis both originating from the city. Its most successful football club Aston Villa has won seven league titles, people from Birmingham are called Brummies, a term derived from the citys nickname of Brum. This originates from the citys name, Brummagem, which may in turn have been derived from one of the citys earlier names. There is a distinctive Brummie accent and dialect, Birminghams early history is that of a remote and marginal area. The main centres of population, power and wealth in the pre-industrial English Midlands lay in the fertile and accessible river valleys of the Trent, the Severn and the Avon. The area of modern Birmingham lay in between, on the upland Birmingham Plateau and within the wooded and sparsely populated Forest of Arden. Birmingham as a settlement dates from the Anglo-Saxon era, within a century of the charter Birmingham had grown into a prosperous urban centre of merchants and craftsmen. By 1327 it was the third-largest town in Warwickshire, a position it would retain for the next 200 years, by 1700 Birminghams population had increased fifteenfold and the town was the fifth-largest in England and Wales. The importance of the manufacture of goods to Birminghams economy was recognised as early as 1538. Equally significant was the emerging role as a centre for the iron merchants who organised finance, supplied raw materials. The 18th century saw this tradition of free-thinking and collaboration blossom into the phenomenon now known as the Midlands Enlightenment
24.
London
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London /ˈlʌndən/ is the capital and most populous city of England and the United Kingdom. Standing on the River Thames in the south east of the island of Great Britain and it was founded by the Romans, who named it Londinium. Londons ancient core, the City of London, largely retains its 1. 12-square-mile medieval boundaries. London is a global city in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism. It is crowned as the worlds largest financial centre and has the fifth- or sixth-largest metropolitan area GDP in the world, London is a world cultural capital. It is the worlds most-visited city as measured by international arrivals and has the worlds largest city airport system measured by passenger traffic, London is the worlds leading investment destination, hosting more international retailers and ultra high-net-worth individuals than any other city. Londons universities form the largest concentration of education institutes in Europe. In 2012, London became the first city to have hosted the modern Summer Olympic Games three times, London has a diverse range of people and cultures, and more than 300 languages are spoken in the region. Its estimated mid-2015 municipal population was 8,673,713, the largest of any city in the European Union, Londons urban area is the second most populous in the EU, after Paris, with 9,787,426 inhabitants at the 2011 census. The citys metropolitan area is the most populous in the EU with 13,879,757 inhabitants, the city-region therefore has a similar land area and population to that of the New York metropolitan area. London was the worlds most populous city from around 1831 to 1925, Other famous landmarks include Buckingham Palace, the London Eye, Piccadilly Circus, St Pauls Cathedral, Tower Bridge, Trafalgar Square, and The Shard. The London Underground is the oldest underground railway network in the world, the etymology of London is uncertain. It is an ancient name, found in sources from the 2nd century and it is recorded c.121 as Londinium, which points to Romano-British origin, and hand-written Roman tablets recovered in the city originating from AD 65/70-80 include the word Londinio. The earliest attempted explanation, now disregarded, is attributed to Geoffrey of Monmouth in Historia Regum Britanniae and this had it that the name originated from a supposed King Lud, who had allegedly taken over the city and named it Kaerlud. From 1898, it was accepted that the name was of Celtic origin and meant place belonging to a man called *Londinos. The ultimate difficulty lies in reconciling the Latin form Londinium with the modern Welsh Llundain, which should demand a form *lōndinion, from earlier *loundiniom. The possibility cannot be ruled out that the Welsh name was borrowed back in from English at a later date, and thus cannot be used as a basis from which to reconstruct the original name. Until 1889, the name London officially applied only to the City of London, two recent discoveries indicate probable very early settlements near the Thames in the London area
25.
Manchester
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Manchester is a major city and metropolitan borough in Greater Manchester, England, with a population of 514,414 as of 2013. It lies within the United Kingdoms second-most populous urban area, with a population of 2.55 million, Manchester is fringed by the Cheshire Plain to the south, the Pennines to the north and east and an arc of towns with which it forms a continuous conurbation. The local authority is Manchester City Council and it was historically a part of Lancashire, although areas of Cheshire south of the River Mersey were incorporated during the 20th century. Throughout the Middle Ages Manchester remained a township but began to expand at an astonishing rate around the turn of the 19th century. Manchesters unplanned urbanisation was brought on by a boom in textile manufacture during the Industrial Revolution, Manchester achieved city status in 1853. The Manchester Ship Canal opened in 1894, creating the Port of Manchester and its fortunes declined after the Second World War, owing to deindustrialisation. The city centre was devastated in a bombing in 1996, but it led to extensive investment, in 2014, the Globalization and World Cities Research Network ranked Manchester as a beta world city, the highest-ranked British city apart from London. Manchester is the third-most visited city in the UK and it is notable for its architecture, culture, musical exports, media links, scientific and engineering output, social impact, sports clubs and transport connections. Manchester Liverpool Road railway station was the worlds first inter-city passenger railway station and in the city scientists first split the atom, the name Manchester originates from the Latin name Mamucium or its variant Mancunium and the citizens are still referred to as Mancunians. These are generally thought to represent a Latinisation of an original Brittonic name, both meanings are preserved in languages derived from Common Brittonic, mam meaning breast in Irish and mother in Welsh. The suffix -chester is a survival of Old English ceaster and their territory extended across the fertile lowland of what is now Salford and Stretford. Central Manchester has been settled since this time. A stabilised fragment of foundations of the version of the Roman fort is visible in Castlefield. After the Roman withdrawal and Saxon conquest, the focus of settlement shifted to the confluence of the Irwell, much of the wider area was laid waste in the subsequent Harrying of the North. Thomas de la Warre, lord of the manor, founded and constructed a church for the parish in 1421. The church is now Manchester Cathedral, the premises of the college house Chethams School of Music. The library, which opened in 1653 and is open to the public today, is the oldest free public reference library in the United Kingdom. Manchester is mentioned as having a market in 1282, around the 14th century, Manchester received an influx of Flemish weavers, sometimes credited as the foundation of the regions textile industry
26.
Rail yard
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A rail yard, railway yard or railroad yard is the US term for a complex series of railroad tracks for storing, sorting, or loading/unloading, railroad cars and/or locomotives. Railroad yards have many tracks in parallel for keeping rolling stock stored off the mainline, railroad cars are moved around by specially designed yard switchers, a type of locomotive. Cars in a railroad yard may be sorted by categories, including railroad company, loaded or unloaded, destination, car type. Railroad yards are built where there is a need to store cars while they are not being loaded or unloaded. Large yards may have a tower to control operations, many railway yards are located at strategic points on a main line. Main line yards are often composed of an Up yard and a Down yard, there are different types of yards, and different parts within a yard, depending on how they are built. They are decoupled and let to accelerate into the classification equipment lower down, a flat yard has no hump, and relies on locomotives for all car movements. A large sub-group of such yards are known as Staging yards, the long haul carrier makes the round trip with a minimal turn around time, and the local switch engine transfers empties to the loading yard when the industries output is ready to be shipped. In the staging yard, the locomotive is most likely operated by industry, since overall throughput speed matters, many have small pneumatic, hydraulic or spring driven braking retarders to adjust and slow speed both before and after yard switch points. Along with car tracking and load tracking to destination technologies such as RFID long trains can be broken down and reconfigured in transfer yards or operations in remarkable time. Transfer yard is a yard where consists are dropped off or picked up as a group by through service such as a Unit Train, but managed locally by local switching service locomotives. Unit tracks may be reserved for Unit trains, which carry a block of all of the same origin and destination. Such consists often stop in a yard for other purposes, inspection. Freight yards may have multiple industries adjacent to them where railroad cars are loaded or unloaded and then stored before they move on to their new destination. Major freight yards in the U. S. Major U. K. goods yards include those in Crewe, Reading and Bescot, near Walsall, coach yards are used for sorting, storing and repairing passenger cars. These yards are located in areas near large stations or terminals. An example of a major U. S. coach yard is Sunnyside Yard in New York City and those that are principally used for storage, such as the West Side Yard in New York, are called layup yards or stabling yards. Major U. K. coach stabling yards include those in Crewe and Longsight, Manchester, which are operated by various regional train companies
27.
Train
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A train is a form of rail transport consisting of a series of vehicles that usually runs along a rail track to transport cargo or passengers. Motive power is provided by a locomotive or individual motors in self-propelled multiple units. Although historically steam propulsion dominated, the most common forms are diesel and electric locomotives. Other energy sources include horses, engine or water-driven rope or wire winch, gravity, pneumatics, batteries, the word train comes from the Old French trahiner, from the Latin trahere pull, draw. There are various types of trains that are designed for particular purposes, a train may consist of a combination of one or more locomotives and attached railroad cars, or a self-propelled multiple unit. The first trains were rope-hauled, gravity powered or pulled by horses, from the early 19th century almost all were powered by steam locomotives. A passenger train is one which includes passenger-carrying vehicles which can often be very long, one notable and growing long-distance train category is high-speed rail. In order to much faster operation over 500 km/h, innovative Maglev technology has been researched for years. In most countries, such as the United Kingdom, the distinction between a tramway and a railway is precise and defined in law, a freight train uses freight cars to transport goods or materials. Freight and passengers may be carried in the train in a mixed consist. Rail cars and machinery used for maintenance and repair of tracks, etc. are termed maintenance of way equipment, similarly, dedicated trains may be used to provide support services to stations along a train line, such as garbage or revenue collection. There are various types of trains that are designed for particular purposes, a train can consist of a combination of one or more locomotives and attached railroad cars, or a self-propelled multiple unit. Trains can also be hauled by horses, pulled by a cable, special kinds of trains running on corresponding special railways are atmospheric railways, monorails, high-speed railways, maglev, rubber-tired underground, funicular and cog railways. A passenger train may consist of one or several locomotives and coaches, alternatively, a train may consist entirely of passenger carrying coaches, some or all of which are powered as a multiple unit. In many parts of the world, particularly the Far East and Europe, freight trains are composed of wagons or trucks rather than carriages, though some parcel and mail trains are outwardly more like passenger trains. Trains can also be mixed, comprising both passenger accommodation and freight vehicles, special trains are also used for track maintenance, in some places, this is called maintenance of way. A train with a locomotive attached at each end is described as top and tailed, where a second locomotive is attached temporarily to assist a train up steep banks or grades it is referred to as banking in the UK, or helper service in North America. Recently, many loaded trains in the United States have been made up one or more locomotives in the middle or at the rear of the train
28.
Valley
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A valley is a low area between hills, often with a river running through it. In geology, a valley or dale is a depression that is longer than it is wide, the terms U-shaped and V-shaped are descriptive terms of geography to characterize the form of valleys. Most valleys belong to one of two main types or a mixture of them, with respect to the cross section of the slopes or hillsides. A valley in its broadest geographic sense is known as a dale. A valley through which a river runs may also be referred to as a vale, a small, secluded, and often wooded valley is known as a dell or in Scotland as a glen. A wide, flat valley through which a river runs is known in Scotland as a strath, a mountain cove is a small valley, closed at one or both ends, in the central or southern Appalachian Mountains which sometimes results from the erosion of a geologic window. A small valley surrounded by mountains or ridges is sometimes known as a hollow, a deep, narrow valley is known as a cwm. Similar geological structures, such as canyons, ravines, gorges, gullies, chines, a valley formed by erosion is called an erosional valley, a valley formed by geologic events such as drop faults or the rise of highlands is called a structural valley. A valley formed by flowing water, or river valley, is usually V-shaped, the exact shape will depend on the characteristics of the stream flowing through it. Rivers with steep gradients, as in mountain ranges, produce steep walls, shallower slopes may produce broader and gentler valleys. However, in the lowest stretch of a river, where it approaches its base level, it begins to deposit sediment, in prehistory, the rivers were used as a source of fresh water and food, as well as a place to wash and a sewer. The proximity of water moderated temperature extremes and provided a source for irrigation, most of the first civilizations developed from these river valley communities. In geography, a vale is a river valley, usually with a particularly wide flood plain or flat valley bottom. In Southern England, vales commonly occur between the escarpment slopes of pairs of chalk formations, where the dome has been eroded, exposing less resistant underlying rock. Rift valleys, such as the Albertine Rift, are formed by the expansion of the Earths crust due to tectonic activity beneath the Earths surface, there are various forms of valley associated with glaciation that may be referred to as glacial valleys. A valley carved by glaciers is normally U-shaped, the valley becomes visible upon the recession of the glacier that forms it. When the ice recedes or thaws, the remains, often littered with small boulders that were transported within the ice. Floor gradient does not affect the shape, it is the glaciers size that does
29.
Prince Edward Viaduct
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The system includes the Rosedale Valley phase and the Sherbourne Phase, an embankment built to extend Bloor Street East to the Rosedale Ravine from Sherbourne Street. The Don Valley phase of the system, the most recognizable, spans the Don River Valley, crossing over the Bayview Avenue Extension, the Don River, the roadway has five lanes with a bicycle lane in each direction. The subway level connects Broadview Station in the east with Castle Frank, designed by Edmund W. Burke, the Prince Edward Viaduct is a three hinged concrete-steel arch bridge with a total span of 494 metres, at 40 metres above the Don Valley. The bridge consists of a made of transverse beams and I-girders. The column supports then transfer the load to the trusses within the arches, finally, the arches transfer their load through large hinges to a concrete pier and eventually to the ground. Steel was provided by Dominion Bridge Company, in addition to the Don River, the Don Valley Parkway, and Bayview Avenue, two railway lines, an electrical transmission line and a bicycle trail all pass under the bridge spans. The projected cost of its construction increased from CDN$759,000 in 1910 to CDN$2.5 million in 1913, upon its completion in 1918, it was named for Prince Edward, Prince of Wales. The bridges designer and the commissioner of works, R. C. Harris, were able to have their way and the lower deck eventually proved to millions of dollars when the Toronto Transit Commissions Bloor–Danforth subway opened in 1966. The Rosedale Valley phase was not used for the subway, as the curve between each phase, as well as the curve to the west at Parliament Street, was considered too sharp for the subway. A separate bridge was built over Rosedale Valley, west of the Castle Frank Subway Station and this covered subway bridge was designed by John B. Parkin and Associates with De Leuw Cather Canada and completed in 1966, the Prince Edward Viaduct resulted in more rapid development of those portions of Toronto lying on the east side of the Don Valley. Over time, the Prince Edward Viaduct became a magnet for suicide, with nearly 500 suicides by 2003, the viaduct ranked as the second most fatal standing structure in North America, after the Golden Gate Bridge in San Francisco. At its peak in 1997, the suicide rate averaged one person every 22 days, in 1957, a child also climbed onto the railing and fell accidentally while walking along it. The council originally approved a C$2.5 million budget, however, the minimum bid for construction was C$5.5 million. Council eventually endorsed a campaign to raise the remainder of the money. Construction was completed in 2003 at the cost of $5.5 million, the barrier was called the Luminous Veil. The tensile structure was difficult to analyze and required several tests at the University of Toronto, initially, cost prohibited the planned lighting to be installed on the top horizontal member
30.
Toronto
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Toronto is the most populous city in Canada and the provincial capital of Ontario. With a population of 2,731,571, it is the fourth most populous city in North America after Mexico City, New York City, and Los Angeles. A global city, Toronto is a centre of business, finance, arts, and culture. Aboriginal peoples have inhabited the area now known as Toronto for thousands of years, the city itself is situated on the southern terminus of an ancient Aboriginal trail leading north to Lake Simcoe, used by the Wyandot, Iroquois, and the Mississauga. Permanent European settlement began in the 1790s, after the broadly disputed Toronto Purchase of 1787, the British established the town of York, and later designated it as the capital of Upper Canada. During the War of 1812, the town was the site of the Battle of York, York was renamed and incorporated as the city of Toronto in 1834, and became the capital of the province of Ontario during the Canadian Confederation in 1867. The city proper has since expanded past its original borders through amalgamation with surrounding municipalities at various times in its history to its current area of 630.2 km2. While the majority of Torontonians speak English as their primary language, Toronto is a prominent centre for music, theatre, motion picture production, and television production, and is home to the headquarters of Canadas major national broadcast networks and media outlets. Toronto is known for its skyscrapers and high-rise buildings, in particular the tallest free-standing structure in the Western Hemisphere. The name Toronto is likely derived from the Iroquois word tkaronto and this refers to the northern end of what is now Lake Simcoe, where the Huron had planted tree saplings to corral fish. A portage route from Lake Ontario to Lake Huron running through this point, in the 1660s, the Iroquois established two villages within what is today Toronto, Ganatsekwyagon on the banks of the Rouge River and Teiaiagonon the banks of the Humber River. By 1701, the Mississauga had displaced the Iroquois, who abandoned the Toronto area at the end of the Beaver Wars, French traders founded Fort Rouillé on the current Exhibition grounds in 1750, but abandoned it in 1759. During the American Revolutionary War, the region saw an influx of British settlers as United Empire Loyalists fled for the British-controlled lands north of Lake Ontario, the new province of Upper Canada was in the process of creation and needed a capital. Dorchester intended the location to be named Toronto, in 1793, Governor John Graves Simcoe established the town of York on the Toronto Purchase lands, instead naming it after Prince Frederick, Duke of York and Albany. Simcoe decided to move the Upper Canada capital from Newark to York, the York garrison was constructed at the entrance of the towns natural harbour, sheltered by a long sandbar peninsula. The towns settlement formed at the end of the harbour behind the peninsula, near the present-day intersection of Parliament Street. In 1813, as part of the War of 1812, the Battle of York ended in the towns capture, the surrender of the town was negotiated by John Strachan. US soldiers destroyed much of the garrison and set fire to the parliament buildings during their five-day occupation, the sacking of York was a primary motivation for the Burning of Washington by British troops later in the war
31.
Canada
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Canada is a country in the northern half of North America. Canadas border with the United States is the worlds longest binational land border, the majority of the country has a cold or severely cold winter climate, but southerly areas are warm in summer. Canada is sparsely populated, the majority of its territory being dominated by forest and tundra. It is highly urbanized with 82 per cent of the 35.15 million people concentrated in large and medium-sized cities, One third of the population lives in the three largest cities, Toronto, Montreal and Vancouver. Its capital is Ottawa, and other urban areas include Calgary, Edmonton, Quebec City, Winnipeg. Various aboriginal peoples had inhabited what is now Canada for thousands of years prior to European colonization. Pursuant to the British North America Act, on July 1,1867, the colonies of Canada, New Brunswick and this began an accretion of provinces and territories to the mostly self-governing Dominion to the present ten provinces and three territories forming modern Canada. With the Constitution Act 1982, Canada took over authority, removing the last remaining ties of legal dependence on the Parliament of the United Kingdom. Canada is a parliamentary democracy and a constitutional monarchy, with Queen Elizabeth II being the head of state. The country is officially bilingual at the federal level and it is one of the worlds most ethnically diverse and multicultural nations, the product of large-scale immigration from many other countries. Its advanced economy is the eleventh largest in the world, relying chiefly upon its abundant natural resources, Canadas long and complex relationship with the United States has had a significant impact on its economy and culture. Canada is a country and has the tenth highest nominal per capita income globally as well as the ninth highest ranking in the Human Development Index. It ranks among the highest in international measurements of government transparency, civil liberties, quality of life, economic freedom, Canada is an influential nation in the world, primarily due to its inclusive values, years of prosperity and stability, stable economy, and efficient military. While a variety of theories have been postulated for the origins of Canada. In 1535, indigenous inhabitants of the present-day Quebec City region used the word to direct French explorer Jacques Cartier to the village of Stadacona, from the 16th to the early 18th century Canada referred to the part of New France that lay along the St. Lawrence River. In 1791, the area became two British colonies called Upper Canada and Lower Canada collectively named The Canadas, until their union as the British Province of Canada in 1841. Upon Confederation in 1867, Canada was adopted as the name for the new country at the London Conference. The transition away from the use of Dominion was formally reflected in 1982 with the passage of the Canada Act, later that year, the name of national holiday was changed from Dominion Day to Canada Day
32.
Bloor Street
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Bloor Street is a major east–west residential and commercial thoroughfare in Toronto, Ontario, Canada. Bloor Street runs from the Prince Edward Viaduct, which spans the Don River Valley, east of the viaduct, Danforth Avenue continues along the same right-of-way. The street, approximately 25 kilometres long, contains a significant cross-sample of Torontos ethnic communities and it is also home to Torontos famous shopping street, the Mink Mile. The street is named after Joseph Bloore, a brewer and land speculator of this area in the 19th century who founded the Village of Yorkville in 1830 and he is buried at Necropolis Cemetery on Bayview Avenue and Rosedale Valley Road. A portion of Line 2 of the Bloor-Danforth subway line runs along Bloor from Kipling Avenue to Yonge Street, and then continues east along Danforth Avenue. Originally surveyed as the first concession road north of the baseline, it was known by names, including the Tollgate Road, then St. Pauls Road. Although Bloore had an e at the end of his surname, Bloor Street was never spelled with it, the idea of installing bicycle lanes on Bloor had been debated since at least the early 1970s. On 4 May 2016, city council voted 38-3 to implement physically separated bike lanes along a 2. 6-km stretch of the street. Mayor John Tory stated, in support of the project, that if council sought to make Toronto a 21st century city, Bloor street begins at the eastern edge of the Prince Edward Viaduct, which passes over the ravine holding the Don River. The street continues through to the Rosedale Ravine, marking the border of the affluent community of Rosedale. West of Parliament Street, the passes just to the north of the large St. James Town housing project. On the northern side of section of Bloor are the forested slopes of the Rosedale Ravine. Between Sherbourne and Church Streets the street is lined by large office towers and this area has long been the centre of the insurance industry in Canada. West of Church the street becomes commercial and is an important shopping district. In downtown, especially around the intersection with Bay Street, Bloor is one of the most exclusive stretches of real estate in Canada. Rents on the upscale Bloor Street have doubled in 4 years, ranking as the 22nd most expensive location in the world in 2006. Nationally, Vancouvers upscale Robson Street tied with Bloor Street West as the most expensive street in Canada, under the intersection of Yonge and Bloor Streets is the Bloor-Yonge subway station, which is the busiest in the city, serving approximately 368,800 people a day. Above ground, the intersection encompasses commercial stores and condominiums and it generally retains its commercial character, and serves as the main shopping area for most of these communities
33.
Toronto subway
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The Toronto subway is a rapid transit system in Toronto, Ontario, Canada, operated by the Toronto Transit Commission. It is a system consisting of three heavy rail lines operating predominantly underground and one elevated light metro line, collectively encompassing 69 stations and 68.3 kilometres of track. It accommodated an average of 1,066,100 passenger trips each weekday during the quarter of 2015. There are 4 rapid transit lines in Toronto plus another under construction, Line 1 Yonge–University, is the longest and busiest rapid transit line in the system. It opened as the Yonge subway in 1954 with a length of 7.4 kilometres, Today, the line is U-shaped having two northern terminals looping on its southern end via Union Station. An 8. 6-kilometre, six-station extension of Line 1 north to Vaughan is under construction, Line 2 Bloor–Danforth, opened in 1966, runs parallel to Bloor Street and Danforth Avenue between Kipling Station in Etobicoke and Kennedy Station in Scarborough. There is a plan to extend Line 2 eastwards from Kennedy Station to Scarborough Town Centre, Line 3 Scarborough is an above-ground medium-capacity rail line serving the citys eponymous suburban district. The line runs from Kennedy Station to McCowan Station passing Scarborough Town Centre and this is the only rapid transit line in Toronto to use Intermediate Capacity Transit System technology. There is a plan to close and dismantle Line 3 after Line 2 is extended to Scarborough Town Centre, Line 5 Eglinton is a 19-kilometre light rail line under construction scheduled to open in 2021. The line will have 25 stations of which 15 will be underground, here is a list of line, extension and station openings on the Toronto subway system. Canadas first subway, the Yonge subway, opened in 1954 with a length of 7.4 kilometres, the line ran under or parallel to Yonge Street between Eglinton Avenue and Union Station. It replaced the Yonge streetcar line, Canadas first streetcar line, in 1963, the line was extended under University Avenue north to Bloor Street to connect with the Bloor-Danforth subway at the double-deck St. George Station. In 1974, the line was extended from Eglinton Station north to Finch Station, the Spadina segment of the line was constructed north from St. George Station initially to Wilson Station in 1978, and eventually to Downsview Station in 1996. Part of the Spadina segment runs in the median of an expressway, four decades of extensions gave the line a U-shaped route running from its two northern terminals and looping on its southern end at Union Station. As of 1996, the line was 30.2 kilometres long, opened in 1966, the Bloor–Danforth subway runs east-west under or near Bloor Street and Danforth Avenue. It replaced the Bloor streetcar line, initially, the subway line ran between Keele Station to Woodbine Station. In 1968, the line was extended west to Islington Station and east to Warden Station, opened in 1985, the Scarborough RT is a light metro line running from Kennedy Station to McCowan station. The TTC started to construct the line to use Canadian Light Rail Vehicles and this line was never extended, and the current plan is to close and dismantle the line, replacing it with an extension of Line 2 to Scarborough Town Centre
34.
Don River (Ontario)
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The Don River is a watercourse in southern Ontario, that empties into Lake Ontario, at Toronto Harbour. Its mouth was just east of the grid of the town of York, Upper Canada. Of the various watercourses that drained Toronto, the Don, the Humber River, the Don is formed from two rivers, the East and West Branches, that meet about 7 kilometres north of Lake Ontario while flowing southward into the lake. The area below the confluence is known as the lower Don, the Don is also joined at the confluence by a third major branch, Taylor-Massey Creek. The Toronto and Region Conservation Authority is responsible for managing the river, humans first arrived in the Don River area approximately 12,500 years BP, most likely as nomadic hunters. While there is archaeological evidence in the Don valley itself. The most significant recorded find is known as the Withrow Site and it was discovered in 1886 during road building just east of Riverdale Park. It contained human remains and other dating back to about 5000 years BP. It is unclear whether the Don River had a native Canadian name, in 1788, Alexander Aitkin, an English surveyor who worked in southern Ontario, referred to the Don River as Ne cheng qua kekonk. Elizabeth Simcoe, wife of Lieutenant Governor John Graves Simcoe, reported in her diary that another name used was Wonscotanach and this is an Anishnaabe phrase meaning the river coming from the back burnt grounds which could refer to an earlier forest fire in the poplar plains to the north. The name Don River was given by Lt. Gov. Simcoe because the wide valley reminded him of the River Don in Yorkshire, after the founding of York in 1793, several mills were constructed along the lower Don. One of the first was at Todmorden Mills and these mills initially turned out lumber, flour and paper products. By the 1850s, there were more than 50 mills along the Don, the Lower Don was becoming an industrial setting. Petroleum storage facilities, poultry and pork processing plants were constructed along the banks of the Don, in 1879, the Don Valley Brick Works opened. Polluted effluent from factories and the growing city nearby was turning the Don. In the 1880s, the part of the Don south of the former Winchester St. bridge was straightened and placed in a channel to create additional harbour space. Known as The Don Improvement Project, the river was also supposed to divert the polluted waters into the Ashbridges Bay marsh. This proved unsuccessful so the mouth was turned 90 degrees west where it empties into the inner harbour and this short extension of the harbour is known as the Keating Channel
35.
Toronto ravine system
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The Toronto ravine system is one of the most distinctive features of the geography of Toronto, Ontario, Canada. It is a network of ravines that form a large urban forest that runs throughout much of the city. For the most part designated as parkland, the ravines are largely undeveloped, Torontos slogan, The city within a park partially stems from the extensive ravine green space. The terrain that the city of Toronto sits on was formed after the end of the last ice age some 12,000 years ago, the glaciers flattened the terrain, and deposited a thick layer of loose sand and soil over the region. Over the millennia, small rivers and creeks eroded this soil cutting deep ravines through what is today the Toronto region, to the north of Toronto is the 1, 900-square-kilometre Oak Ridges Moraine. The largest ravines are home to the rivers running south from the Moraine to Lake Ontario, the Humber River, the Don River, smaller creeks and streams rise within Toronto from rain and melt water. The Don River is categorized as a river, as it is too small for its relatively steep. Despite the dense population of metropolitan Toronto, many of the ravines have been close to their natural state. The most important reason for this is the danger of flooding, the rivers and streams that flow through the ravines are highly variable. During the late summer, many of the smaller ones will slow to a trickle or even disappear completely, during the spring and after major storms, the creeks often overflow their banks. Every few decades, a flooding event will occur where the ravines are almost totally flooded. The most recent such event was in 1954 when Hurricane Hazel arrived and that storm dropped over 12 cm of rain on the city in a day onto soil that was already waterlogged by a week of rain. In the post-war boom years, several developments had begun to encroach on the lands. Whole blocks were washed away and 81 people killed, the damage was most severe along the Humber River, where a part of a street was destroyed completely. This disaster led to an almost complete ban on development in the ravines, early settlers quickly discovered that the sandy and gravelly soil of the ravines made them unsuitable for agriculture. They were extensively logged during the century, and there are very few trees in the ravines that date to before the end of logging around 1850. The rivers and creeks were also an important source of power for early European settlers, the largest of the ravines, the Don Valley, is one of the most transformed. The southern portion of the Don was completely encased in a channel to prevent flooding
36.
Millau Viaduct
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The Millau Viaduct is a cable-stayed bridge that spans the valley of the River Tarn near Millau in southern France. It is the tallest bridge in the world with one summit at 343.0 metres above the base of the structure. The Millau Viaduct is part of the A75-A71 autoroute axis from Paris to Béziers, the cost of construction was approximately €394 million. It was formally inaugurated on 14 December 2004, and opened to traffic on 16 December. The first plans were discussed in 1987 by CETE, and by October 1991, during 1993–1994 the government consulted with seven architects and eight structural engineers. During 1995–1996, a second study was made by five associated architect groups. In January 1995, the government issued a declaration of public interest to solicit design approaches for a competition, in July 1996, the jury decided in favour of a cable-stayed design with multiple spans, as proposed by the Sogelerg consortium. The decision to proceed by grant of contract was made in May 1998, then in June 2000 the contest for the contract was launched. In March 2001 Eiffage established the subsidiary Compagnie Eiffage du Viaduc de Millau and was declared winner of the contest and this option would have allowed access to Millau only from the Larzac plateau, using the long and tortuous descent from La Cavalerie. Although this option was shorter and better suited to through traffic, it did not satisfactorily serve the needs of Millau, great Western, longer than the eastern option by 12 km, following the Cernon valley. Technically easier, this solution was judged to have negative impacts on the environment, in particular on the villages of Peyre. It was more expensive than the option, and served the region badly. Near RN9, would have served the town of Millau well, intermediate, west of Millau was supported by local opinion, but presented geological difficulties, notably on the question of crossing the valley of the Tarn. Expert investigation concluded that these obstacles were not insurmountable, the fourth option was selected by ministerial decree on 28 June 1989. The choice of the solution was decided by ministerial decree on 29 October 1991. After the choice of the viaduct, five teams of architects. The concept and design for the bridge was devised by French designer Michel Virlogeux and he worked with the Dutch engineering firm ARCADIS, responsible for the structural engineering of the bridge. The high solution required the construction of a 2,500 m long viaduct, from 1991 to 1993, the structures division of Sétra, directed by Michel Virlogeux, carried out preliminary studies and examined the feasibility of a single structure spanning the valley
37.
Tarn (river)
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The Tarn is a 381-kilometre long river in southern France, right tributary of the Garonne. Its basin covers approximately 12,000 square kilometres, and it has a flow of approximately 140 cubic metres per second. The Millau Viaduct spans the valley of the River Tarn near Millau, the Millau Viaduct, the tallest bridge in the world, carrying the A75 autoroute across the Tarn Gorge near Millau, opened in December 2004. The Tarn is famous for its brutal floodings, which are the most dangerous in Europe along with the Danube River. The flooding of March 1930 saw the Tarn rise more than 17 metres above its level in Montauban in just 24 hours. The Tarn was once navigable from its junction with the Garonne to Corbarieu and this stretch of river included seven river locks over a distance of 38 kilometres. The canal was linked to the Canal de Garonne in Moissac by a branch lock upstream of the first river lock, the two access points from the Canal de Garonne have both been restored, and boats can again access the immediate reaches of the river at these points. The remaining six river locks are disused and unnavigable, gorges du Tarn Tourism in Tarn http, //www. geoportail. fr The Tarn at the Sandre database French Waterways - River Tarn Navigation guide to the lower 40 km. http, //www. gorgesdutarn. net/. lang=en
38.
Millau
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Millau is a commune in the Aveyron department in the French Midi-Pyrenees region in southern France. It is 70 kilometres from the Aveyron prefecture headquarters in Rodez and it is located at the confluence of the Tarn and Dourbie rivers. It is surrounded by the landscapes of Gorges du Tarn, Causse du Larzac and it is part of the former province of Rouergue where they also communicate through a form of Occitan language, the Rouergat dialect. Its inhabitants are called Millavois and Millavoises, the territory of the municipality is part of the Regional Natural Park of Grands Causses. The town dates back nearly 3000 years when it was situated on the hills above the Granède, the plain gave the town its Gallic name of Condatomagus. The site of Condatomagus was identified in the 19th century by Dieudonne du Rey and was close to the major centre in the Roman Empire. This is where luxury ceramics such as red terra sigillata were made, the local museum sits almost adjacent to this site. By the ninth century the town has grown and is the seat of a viguerie, an administrative court. At this time the town is surrounded by ramparts, in 1187, the King of Aragon grants him the seal and communal freedom of Provence by Consular Charter. A consulate was created, and was responsible for administering the city to raise taxes. In 1271, Millau passed to the crown of the kings of France, in 1361, during the Hundred Years War, the city came under English rule. The return to peace in the fifteenth century gave the city a boost and it is Louis XI which connects Millau to the crown in 1476 by letters patent. In the Middle Ages the town had one of the major bridges across the River Tarn. It had 17 spans, but after one poorly maintained span fell in the 18th century, just one span remains, with a mill that is now an art gallery, as testament to this significant trading route from north to south across pre-Renaissance France. It was also an opportunity to protest against the spread of fast food, Americanization, the McDonalds was soon rebuilt, and Bové spent a few weeks in jail. He is now representative at the European Parliament and it is also a major centre for outdoor sporting activity. Traditional arms of the city of Millau Gold with four pallets gules, the city itself is administered through elected consuls - like Toulouse and its sheriffs - while the king was the sole and direct lord. Few cities in France, enjoyed such a regime of autonomy, the territory of this town lies across a southern portion of the Massif Central
39.
Michel Virlogeux
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Dr. Michel Virlogeux FREng is a French structural engineer and bridge specialist. Virlogeux graduated from the École Polytechnique in 1967 and from the École Nationale des Ponts et Chaussées in 1970, from 1970 to 1973 he served in Tunisia on road projects and at the same time gained his Engineering Doctorate from the Pierre et Marie Curie University. In January 1974 he joined the Bridge Department of SETRA, the service of the French Highway Administration. In 1980 he became Head of the Large Concrete Bridge Division, during twenty years he designed more than 100 bridges, including the Normandy Bridge which held the world record for longest cable-stayed bridge for four years. Several of his bridges have received architectural awards, a member of the International Association for Bridge and Structural Engineering since 1974, Dr. Virlogeux received the inaugural IABSE Prize in Venice in 1983. He is a member of the French Academy of Technology, the Award Presentation took place during the Opening of the IABSE Symposium Structures for High-Speed Railway Transportation, Antwerp, Belgium on 27 August 2003. The presentation was presented by Dr. Manabu Ito, President of IABSE, in 2010 he was invited to deliver the MacMillan Memorial Lecture to the Institution of Engineers and Shipbuilders in Scotland. He chose the subject The Design of Long Span Bridges and he was appointed an International Fellow of the Royal Academy of Engineering in 2012. Dr Michel Virlogeux, France IABSE biography Michel Virlogeux information at Structurae
40.
Norman Foster, Baron Foster of Thames Bank
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Norman Robert Foster, Baron Foster of Thames Bank, OM, HonFREng is a British architect whose company, Foster + Partners, maintains an international design practice famous for high-tech architecture. He is one of Britains most prolific architects of his generation, in 1999, he was awarded the Pritzker Architecture Prize, often referred to as the Nobel Prize of architecture. In 2009, Foster was awarded the Prince of Asturias Award in the Arts category, in 1994, he received the AIA Gold Medal. Foster was born to Robert Foster and Lilian Smith in 1935 in Reddish, Stockport and they moved, soon after his birth, two miles to 4 Crescent Grove in Levenshulme, Manchester, which they rented for fourteen shillings a week, Foster has no recollection of Reddish. He attended Burnage Grammar School for Boys in Burnage, in a Guardian interview in 1999, Foster said he always felt different at school and was bullied and he retired into the world of books. He considered himself quiet and awkward in his early years often making faux pas and he was fascinated with engineering and the process of designing. He says that caused him to pursue a career designing buildings, specific interests included aircraft, a hobby he maintains today, and trains, generated by viewing passing trains on the railway outside his terraced home during his childhood. Fosters father convinced him to take the exam for Manchester Town Halls trainee scheme which he passed in 1951. A colleague, Mr Cobbs son, was studying architecture and his interest led to Foster considering a career in architecture. After working in the Manchester City Treasurers office, Foster completed his National Service in 1953 serving in the Royal Air Force, Foster returned to Manchester, not wanting to return to the town hall as his parents wished and unsure of which path to follow. Foster was searching for an away from his working-class roots which led to the alienation of his parents. Foster took a job as assistant to a manager with John Bearshaw and Partners. The staff advised him, that if he wished to become an architect, he should prepare a portfolio of drawings using the perspective, Bearshaw was so impressed with the drawings that he promoted the young Foster to the drawing department of the practice. In 1956 Foster won a place at the University of Manchester School of Architecture and he combined these with self-tuition via visits to the local library in Levenshulme. Foster took a keen interest in the works of Frank Lloyd Wright, Ludwig Mies van der Rohe, Le Corbusier and Oscar Niemeyer, Foster won the Henry Fellowship to the Yale School of Architecture, where he met future business partner Richard Rogers and earned his masters degree. Vincent Scully encouraged Foster and Rogers to travel in America for a year, after returning to the UK in 1963 he set up an architectural practice as Team 4 with Rogers and the sisters Georgie and Wendy Cheesman. Georgie was the one of the team that had passed her RIBA exams allowing them to set up in practice on their own. Team 4 quickly earned a reputation for industrial design
41.
Eiffel Tower
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The Eiffel Tower is a wrought iron lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed, the Eiffel Tower is the most-visited paid monument in the world,6.91 million people ascended it in 2015. The tower is 324 metres tall, about the height as an 81-storey building. Its base is square, measuring 125 metres on each side, due to the addition of a broadcasting aerial at the top of the tower in 1957, it is now taller than the Chrysler Building by 5.2 metres. Excluding transmitters, the Eiffel Tower is the second-tallest structure in France after the Millau Viaduct, the tower has three levels for visitors, with restaurants on the first and second levels. The top levels upper platform is 276 m above the ground – the highest observation deck accessible to the public in the European Union, tickets can be purchased to ascend by stairs or lift to the first and second levels. The climb from ground level to the first level is over 300 steps, although there is a staircase to the top level, it is usually only accessible by lift. Eiffel openly acknowledged that inspiration for a tower came from the Latting Observatory built in New York City in 1853, sauvestre added decorative arches to the base of the tower, a glass pavilion to the first level, and other embellishments. Little progress was made until 1886, when Jules Grévy was re-elected as president of France and Édouard Lockroy was appointed as minister for trade. On 12 May, a commission was set up to examine Eiffels scheme and its rivals, which, after some debate about the exact location of the tower, a contract was signed on 8 January 1887. Eiffel was to all income from the commercial exploitation of the tower during the exhibition. He later established a company to manage the tower, putting up half the necessary capital himself. The proposed tower had been a subject of controversy, drawing criticism from those who did not believe it was feasible and these objections were an expression of a long-standing debate in France about the relationship between architecture and engineering. And for twenty years … we shall see stretching like a blot of ink the hateful shadow of the column of bolted sheet metal. Gustave Eiffel responded to criticisms by comparing his tower to the Egyptian pyramids. Will it not also be grandiose in its way, and why would something admirable in Egypt become hideous and ridiculous in Paris. Indeed, Garnier was a member of the Tower Commission that had examined the various proposals, some of the protesters changed their minds when the tower was built, others remained unconvinced. Guy de Maupassant supposedly ate lunch in the restaurant every day because it was the one place in Paris where the tower was not visible
42.
Empire State Building
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The Empire State Building is a 102-story skyscraper located on Fifth Avenue between West 33rd and 34th Streets in Midtown, Manhattan, New York City. It has a height of 1,250 feet, and with its antenna included. Its name is derived from the nickname for New York, the Empire State and it stood as the worlds tallest building for nearly 40 years, from its completion in early 1931 until the topping out of the original World Trade Centers North Tower in late 1970. Following the September 11 attacks in 2001, the Empire State Building was again the tallest building in New York, the Empire State Building is currently the fifth-tallest completed skyscraper in the United States and the 34th-tallest in the world. It is also the fifth-tallest freestanding structure in the Americas, when measured by pinnacle height, it is the fourth-tallest building in the United States. The Empire State Building is an American cultural icon and it is designed in the distinctive Art Deco style and has been named as one of the Seven Wonders of the Modern World by the American Society of Civil Engineers. The building and its street floor interior are designated landmarks of the New York City Landmarks Preservation Commission and it was designated as a National Historic Landmark in 1986. In 2007, it was ranked number one on the AIAs List of Americas Favorite Architecture, the site of the Empire State Building was first developed as the John Thompson Farm in the late 18th century. At the time, a stream ran across the site, emptying into Sunfish Pond, beginning in the late 19th century, the block was occupied by the Waldorf-Astoria Hotel, frequented by The Four Hundred, the social elite of New York. The limestone for the Empire State Building came from the Empire Mill in Sanders, Indiana which is a town adjacent to Bloomington. The Empire Mill Land office is near State Road 37 and Old State Road 37 just south of Bloomington, the Bloomington, Bedford, and Oolitic area is known locally as the limestone capital of the world. The Empire State Building was designed by William F, the building was designed from the top down. The general contractors were The Starrett Brothers and Eken, and the project was financed primarily by John J. Raskob, the construction company was chaired by Alfred E. Smith, a former Governor of New York and James Farleys General Builders Supply Corporation supplied the building materials. John W. Bowser was project construction superintendent, excavation of the site began on January 22,1930, and construction on the building itself started on March 17—St. Patricks Day—per Al Smiths influence as Empire State, Inc. president, the project involved 3,400 workers, mostly immigrants from Europe, along with hundreds of Mohawk iron workers, many from the Kahnawake reserve near Montreal. According to official accounts, five died during the construction. Governor Smiths grandchildren cut the ribbon on May 1,1931, lewis Wickes Hines photography of the construction provides not only invaluable documentation of the construction, but also a glimpse into common day life of workers in that era. The construction was part of a competition in New York for the title of worlds tallest building
43.
Guinness World Records
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The book itself holds a world record, as the best-selling copyrighted book of all time. As of the 2017 edition, it is now in its 63rd year of publication, the international franchise has extended beyond print to include television series and museums. On 10 November 1951, Sir Hugh Beaver, then the director of the Guinness Breweries, went on a shooting party in the North Slob, by the River Slaney in County Wexford. After missing a shot at a golden plover, he involved in an argument over which was the fastest game bird in Europe. That evening at Castlebridge House, he realised that it was impossible to confirm in reference books whether or not the golden plover was Europes fastest game bird. Beaver knew that there must be numerous other questions debated nightly in pubs throughout Ireland and abroad and he realised then that a book supplying the answers to this sort of question might prove successful. Beavers idea became reality when Guinness employee Christopher Chataway recommended University friends Norris and Ross McWhirter, the twin brothers were commissioned to compile what became The Guinness Book of Records in August 1954. A thousand copies were printed and given away, after the founding of The Guinness Book of Records at 107 Fleet Street, the first 198-page edition was bound on 27 August 1955 and went to the top of the British best seller lists by Christmas. The following year, it launched in the US, and sold 70,000 copies, since then, Guinness World Records has become a household name and the global leader in world records. Because the book became a hit, many further editions were printed, eventually settling into a pattern of one revision a year, published in September/October. The McWhirters continued to compile it for many years, Ross McWhirter was assassinated by the Provisional Irish Republican Army in 1975. Following Ross assassination, the feature in the show where questions about records posed by children were answered was called Norris on the Spot, Guinness Superlatives Limited was formed in 1954 to publish the first book. Sterling Publishing owned the rights to the Guinness book in the US for decades, and, under their management, the group was owned by Guinness PLC and subsequently Diageo until 2001, when it was purchased by Gullane Entertainment. Gullane was itself purchased by HIT Entertainment in 2002, with offices in New York City and Tokyo, Guinness World Records global headquarters remain in London, while its museum attractions are based at Ripley headquarters in Orlando, Florida, US. Recent editions have focused on record feats by person competitors, many records also relate to the youngest person who achieved something, such as the youngest person to visit all nations of the world, being Maurizio Giuliano. Each edition contains a selection of the records from the Guinness database, as well as new records. The majority of records are no longer listed in the book or on the website. For those unable to wait the 4–6 weeks for a reply, the Guinness Book of Records is the worlds most sold copyrighted book, earning it an entry within its own pages
44.
Deansgate-Castlefield tram stop
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Deansgate-Castlefield is a tram stop on Greater Manchesters Metrolink light rail system, on Deansgate in the Castlefield area of Manchester city centre. The station underwent redevelopment in 2014–15 to add a platform in preparation for the completion of the Second City Crossing in 2016–17. Deansgate-Castlefield serves as a hub by integrating with National Rail services from Deansgate railway station by a footbridge. Exits from the lead to the Great Northern Warehouse, the reconstructed Mamucium Roman Fort, the Beetham Tower. Part of the City Zone, the stop is one of the most used on the Metrolink network, following the Beeching cuts, the station was deemed surplus to requirements and closed to passengers on 5 May 1969. The listed building survived as a landmark, and after serving as a car park. The viaduct arches beneath the station, overlooking the Rochdale Canal, have since been refurbished and converted into the Deansgate Locks development comprising bars, restaurants, in August 2010 Metrolink announced it would be changing the name of the stop from G-Mex to Deansgate-Castlefield. It had been thought for some time that the city crossing expansion would require a third platform at the stop. However,2011 proposals showed St Peters Square as a major 4-platform interchange, at MIPIM2010 proposals were unveiled for a redevelopment of the area behind the conference centre. The new island platform opened in December 2014 and additional green themed modifications were added in 2015
, Turkey.
