Suspension bridge
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A suspension bridge is a type of bridge in which the deck is hung below suspension cables on vertical suspenders. The first modern examples of this type of bridge were built in the early 1800s. Simple suspension bridges, which lack vertical suspenders, have a long history in many mountainous parts of the world.
The 1915 Çanakkale Bridge on the Dardanelles strait in Turkey, connecting Europe and Asia, is the longest suspension bridge in the world.
The double-decked George Washington Bridge, connecting New York City to Bergen County, New Jersey, is the world's busiest suspension bridge, carrying 106 million vehicles annually.
Chushul Chakzam, one of Thangtong Gyalpo's chain bridges, in 1904
The wooden 1808 Burr Suspension Bridge in Schenectady, NY, USA, during demolition in 1871, showing wooden cables. Spans of 160, 190, 180 and 157 feet on 3 piers began to sag, and 4 supporting piers were added in 1833 making 8 spans.
Bridge
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A bridge is a structure built to span a physical obstacle without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.
A temporary wooden footbridge leading to Luang Prabang in Laos
The covered bridge in West Montrose, Ontario, Canada
The Albertus L. Meyers Bridge in Allentown, Pennsylvania, U.S., "one of the earliest surviving examples of monumental, reinforced concrete construction," according to the American Society of Civil Engineers.
Mohammed VI Bridge in Morocco