Santa Ana River
The Santa Ana River is the largest river within Southern California in the United States. It rises in the San Bernardino Mountains and flows for most of its length through San Bernardino and Riverside Counties, before cutting through the northern Santa Ana Mountains via Santa Ana Canyon and flowing southwest through urban Orange County to drain into the Pacific Ocean; the Santa Ana River is 96 miles long, its drainage basin is 2,650 square miles in size. The Santa Ana drainage basin has a diversity of terrain, ranging from high peaks of inland mountains in the north and east, to the hot, dry interior and semi-desert basins of the Inland Empire, to the flat coastal plain of Orange County. Although it includes areas of alpine and highland forest, the majority of the watershed consists of arid desert and chaparral environments. Due to low regional rainfall, the river carries only a small flow except during the brief winter season, when it is prone to massive flash floods; the San Jacinto River, which drains the southern half of the watershed reaches the Santa Ana except in wet years.
However, a wide variety of animal and plant communities depend on the riparian zones and remnant wetlands along the Santa Ana River. Humans have lived on the Santa Ana River for at least 9,000 years. In the period before and during European colonization, there were four distinct indigenous groups in the area; the river was first seen by Europeans in 1769, when it received its name from members of the Spanish Portola expedition. Because it was one of the only reliable sources of water in a wide region, many large ranchos developed along the river and one of its major tributaries, Santiago Creek. After the area became part of the United States, the economy transitioned to agriculture, before urbanizing in the 20th century. Many cities established during this time including Santa Ana and Anaheim derived their names from the river. In order to protect urban areas from the river's flood threat, major channelization and damming projects were undertaken in the 20th century, resulting in the loss of much of the natural river channel.
The Santa Ana River rises in the southern San Bernardino Mountains, at the confluence of two tiny streams, Heart Bar Creek and Coon Creek, at an elevation of 6,991 feet. Its highest sources are Dollar Lake, at 9,288 feet, Dry Lake, at 9,068 feet, both on the northern flank of San Gorgonio Mountain, at the headwaters of the South Fork Santa Ana River; the river flows west through a wide and forested mountain valley. About 18 miles from its headwaters, it receives its first major tributary, Bear Creek, which enters from the north. Bear Creek receives its water from a popular recreational mountain lake; the river turns south, passing through the Seven Oaks Dam, reaches the arid Inland Empire lowland covering large parts of San Bernardino County and Riverside County. It receives Mill Creek from the south and passes to the south of San Bernardino receives City Creek from the north and San Timoteo Creek from the south. Due to water diversions for groundwater recharge, the river bed is dry in this stretch between Mill Creek and the outlet of the Veolia water treatment plant north of Riverside, which restores a year-round flow.
From there to Prado Dam the river supports a riparian zone with considerable greenery. Not far below the confluence with San Timoteo Creek, Lytle Creek enters from the north. Lytle Creek is one of the largest tributaries of the Santa Ana river, rising from three forks in the San Gabriel Mountains and flowing southeast, before emptying into the Santa Ana River as Lytle Creek Wash. From there, the river turns southwest, after passing through western Riverside, it discharges into the dry flood control reservoir formed by Prado Dam. Two major tributaries of the river join in the reservoir area: Chino Creek from the north, Temescal Creek from the south. Temescal Creek drains the largest area of all the tributaries, because it provides the outflow from Lake Elsinore, into which the San Jacinto River flows, it is one of the longest, at 32 miles in length. Except during the wettest years when Lake Elsinore fills high enough to overflow, Temescal Creek contributes little to no water into the Santa Ana River.
Below Prado Dam, the Santa Ana River crosses into Orange County, cuts between the Santa Ana Mountains and Chino Hills via the narrow Santa Ana Canyon. The river bisects the county as it flows southwest towards the ocean. In Anaheim, the entire flow of the river is diverted into spreading grounds for groundwater recharge of the north Orange County aquifer, providing about half of the county's municipal water supply. Downstream of there, the river is confined to a concrete channel, serving only for flood control and urban runoff drainage, is dry or a small trickle. At Orange it receives Santiago Creek from the east before entering Santa Ana. After crossing under Interstate 5 it passes through the River View Golf Course, one of its few non-concreted sections within Orange County, becomes a concrete channel again through most of Santa Ana and Fountain Valley to a point below the 405 Freeway, where the river bed becomes natural; the mouth of the river is located in a small tidal lagoon between Huntington Beach and Newport Beach, at the northern end of Santa Ana River County Beach.
The Santa Ana River drains the largest watershed of California's South Coast region, covering 2,650 square miles in parts of San Bernardino, Riverside and Los Angeles Counties. Although the river does not pass through Los Angeles County, some of its tributaries, including San Antonio Creek extend i
California Department of Transportation
The California Department of Transportation is an executive department of the US state of California. The department is part of the cabinet-level California State Transportation Agency. Caltrans is headquartered in Sacramento. Caltrans manages the state's highway system, which includes the California Freeway and Expressway System, is involved with public transportation systems throughout the state, it supports Amtrak's Capitol Corridor. In 2015, Caltrans released a new mission statement: "Provide a safe, sustainable and efficient transportation system to enhance California’s economy and livability." The earliest predecessor of Caltrans was the Bureau of Highways, created by the California Legislature and signed into law by Governor James Budd in 1895. This agency consisted of three commissioners who were charged with analyzing the state road system and making recommendations. At the time, there was no state highway system. California's roads consisted of crude dirt roads maintained by county governments, as well as some paved roads within city boundaries, this ad hoc system was no longer adequate for the needs of the state's growing population.
After the commissioners submitted their report to the governor on November 25, 1896, the legislature replaced the Bureau with the Department of Highways. Due to the state's weak fiscal condition and corrupt politics, little progress was made until 1907, when the legislature replaced the Department of Highways with the Department of Engineering, within which there was a Division of Highways. California voters approved an US$18 million bond issue for the construction of a state highway system in 1910, the first California Highway Commission was convened in 1911. On August 7, 1912, the department broke ground on its first construction project, the section of El Camino Real between South San Francisco and Burlingame, which became part of California State Route 82; the year 1912 saw the founding of the Transportation Laboratory and the creation of seven administrative divisions, which are the predecessors of the 12 district offices in use as of 2018. The original seven division headquarters were located in: Willits Mercantile Building for Del Norte, Humboldt and Mendocino counties Redding C.
R. Briggs Building for Lassen, Shasta, Siskiyou and Trinity counties Sacramento Forum Building for Alpine, Butte, Colusa, El Dorado, Nevada, Plumas, San Joaquin, Solano, Sutter, Tuolumne and Yuba counties San Francisco Rialto Building for Alameda, Contra Costa, Napa, San Francisco, Santa Clara, Santa Cruz, San Mateo, Sonoma counties San Luis Obispo Union National Bank Building for Monterey, San Benito, Santa Barbara, San Luis Obispo counties Fresno Forsythe Building for Fresno, Kern, Madera, Merced and Tulare counties Los Angeles Union Oil Building for Imperial, Los Angeles, Riverside, San Bernardino, San Diego, Ventura countiesIn 1913, the California State Legislature began requiring vehicle registration and allocated the resulting funds to support regular highway maintenance. In 1921, the state legislature turned the Department of Engineering into the Department of Public Works; the history of Caltrans and its predecessor agencies during the 20th century was marked by many firsts. It was one of the first agencies in the United States to paint centerlines on highways statewide.
In late 1972, the legislature approved a reorganization, suggested by a study initiated by then-Governor Ronald Reagan, in which the Department of Public Works was merged with the Department of Aeronautics to become the modern California Department of Transportation. For administrative purposes, Caltrans divides the State of California into 12 districts, supervised by district offices. Most districts cover multiple counties; the largest districts by population are District 4 and District 7. Like most state agencies, Caltrans maintains its headquarters in Sacramento, covered by District 3. Transportation in California State highways in California United States Department of Transportation List of roads and highways Official website Named Highways, Freeways and Other Appurtenances in California
Culver City, California
Culver City is a city in Los Angeles County, California. The city was named after Harry Culver; as of the 2010 census, the city had a population of 38,883. It is surrounded by the city of Los Angeles, but shares a border with unincorporated areas of Los Angeles County. Over the years, it has annexed more than 40 pieces of adjoining land and now comprises about five square miles. Since the 1920s, Culver City has been a center for motion picture and television production, best known as the home of Metro-Goldwyn-Mayer studios. From 1932 to 1986, it was the headquarters for the Hughes Aircraft Company. National Public Radio West and Sony Pictures Entertainment have headquarters in the city; the NFL Network studio is based in Culver City. Archaeological evidence suggests a human presence in the area of present-day Culver City since at least 8,000 BC; the region was the homeland of the Tongva-Gabrieliño Native Americans. The city was founded on the lands of the former Rancho La Ballona, Rancho Rincon de los Bueyes, Rancho La Cienega o Paso de la Tijera.
In 1861, during the American Civil War, Camp Latham was established by the 1st California Infantry under Col. James H. Carleton and the 1st California Cavalry under Lt. Col. Benjamin F. Davis. Named for California Senator Milton S. Latham, the camp was the first staging area for the training of Union troops and their operations in Southern California, it was located on land of the Rancho La Ballona, on the South side of Ballona Creek, near what is now the intersection of Jefferson and Overland Boulevards. The post was moved to Camp Drum, which became the Drum Barracks. Harry Culver first attempted to establish Culver City in 1913; the first film studio in Culver City was built by Thomas Ince in 1918. Silent film comedy producer Hal Roach built his studios there in 1919, Metro Goldwyn Mayer in the'20s. During Prohibition and nightclubs such as the Cotton Club lined Washington Boulevard. Culver Center, one of Southern California's first shopping malls, was completed in 1950 on Venice Boulevard near the Overland Avenue intersection.
Many other retail stores, including a Rite Aid and several banks and restaurants, have occupied the center since then. Hughes Aircraft opened its Culver City plant in July 1941. There the company built the H-4 Hercules transport. Hughes was an active subcontractor in World War II, it developed and patented a flexible feed chute for faster loading of machine guns on B-17 bombers, manufactured electric booster drives for machine guns. Hughes produced more ammunition belts than any other American manufacturer, built 5,576 wings and 6,370 rear fuselage sections for Vultee BT-13 trainers. Hughes grew after the war, in 1953 Howard Hughes donated all his stock in the company to the Howard Hughes Medical Institute. After he died in 1976, the institute sold the company, which made it the second-best-endowed medical research foundation in the world; the Hal Roach Studios were demolished in 1963. In the late 1960s, much of the MGM backlot acreage, the nearby 28.5-acre of the RKO Forty Acres, once owned by RKO Pictures and Desilu Productions, were sold by their owners.
In 1976 the sets were razed to make way for redevelopment. Today the RKO site is the southern expansion of the Hayden Industrial Tract, while the MGM property has been converted to a subdivision and a shopping center known as Raintree Plaza. In the 1990s, Culver City launched a successful revitalization program in which it renovated its downtown as well as several shopping centers in the Sepulveda Boulevard corridor near Westfield Culver City. Around the same time, Sony's motion picture subsidiary, Columbia Pictures, moved into the old MGM lot; the influx of many art galleries and restaurants to the eastern part of the city, formally designated the Culver City Art District, prompted The New York Times in 2007 to praise the new art scene and call Culver City a "nascent Chelsea."In 2012 Roger Vincent of the Los Angeles Times said that, according to local observers, the city's "reputation as a pedestrian-friendly destination with upscale restaurants, gastropubs and a thriving art scene is less than a decade old."
Hundreds of movies have been produced on the lots of Culver City's studios: Sony Pictures Studios, Culver Studios, the former Hal Roach Studios. These include The Wizard of Oz, The Thin Man, Gone with the Wind, the Tarzan series, the original King Kong. More recent films made in Culver City include Grease, Raging Bull, E. T. the Extra-Terrestrial, City Slickers, Air Force One, Wag the Dog and Contact. Television series made on Culver City sets have included Las Vegas, Cougar Town, Mad About You, Hogan's Heroes, The Green Hornet, Arrested Development, The Andy Griffith Show, Gomer Pyle, U. S. M. C. Jeopardy!, The Nanny, Hell's Kitchen, MasterChef, the syndicated version of Wheel of Fortune and Tosh. O; the television series The Green Hornet featured Bruce Lee as Kato. John Travolta's "Stranded at the Drive-In" sequence in Grease was filmed at the Studio Drive-In on the corner of Jefferson and Sepulveda, it served as a set including Pee-wee's Big Adventure. The theatre was closed in 1993 and demolished in 1998.
Culver City's streets have been featured in television series. Since much of the
Orange County, California
Orange County is located in the Los Angeles metropolitan area in the U. S. state of California. As of the 2010 census, the population was 3,010,232, making it the third-most populous county in California, the sixth-most populous in the United States, more populous than 21 U. S. states. Its county seat is Santa Ana, it is the second most densely populated county behind San Francisco County. The county's four largest cities by population, Santa Ana and Huntington Beach, each have a population exceeding 200,000. Several of Orange County's cities are on the Pacific Ocean western coast, including Huntington Beach, Newport Beach, Laguna Beach, Dana Point, San Clemente. Orange County is included in Metropolitan Statistical Area. Thirty-four incorporated towns and cities are in the county. Anaheim was the first city, incorporated in 1870 when the region was still part of neighboring Los Angeles County. Whereas most population centers in the United States tend to be identified by a major city with a large downtown central business district, Orange County has no single major downtown / CBD or dominant urban center.
Santa Ana, Costa Mesa, Irvine all have smaller high-rise CBDs, other, older cities like Anaheim, Huntington Beach, Orange have traditional American downtowns without high-rises. The county's northern and central portions are urbanized and dense, despite the prevalence of the single-family home as a dominant land use, its southern portion is more suburban, with limited urbanization. There are several "edge city"-style developments, such as Irvine Business Center, Newport Center, South Coast Metro. Orange County is part of the "Tech Coast"; the county is a tourist center, with attractions like Disneyland, Knott's Berry Farm, several popular beaches along its more than 40 miles of coastline. Throughout the 20th century and up until 2016, it was known for its political conservatism and for being a bastion for the Republican Party, with a 2005 academic study listing three Orange County cities as among America's 25 most conservative. However, the county's changing demographics have resulted in a shift in political alignments.
In 2016, Hillary Clinton became the first Democrat since 1936 to carry Orange County in a presidential election and in the 2018 midterm elections the Democratic Party gained control of every Congressional seat in the county. Members of the Tongva, Juaneño, Luiseño Native American groups long inhabited the area. After the 1769 expedition of Gaspar de Portolà, a Spanish expedition led by Junipero Serra named the area Valle de Santa Ana. On November 1, 1776, Mission San Juan Capistrano became the area's first permanent European settlement. Among those who came with Portolá were José Manuel Nieto and José Antonio Yorba. Both these men were given land grants—Rancho Los Nietos and Rancho Santiago de Santa Ana, respectively; the Nieto heirs were granted land in 1834. The Nieto ranches were known as Rancho Los Alamitos, Rancho Las Bolsas, Rancho Los Coyotes. Yorba heirs Bernardo Yorba and Teodosio Yorba were granted Rancho Cañón de Santa Ana and Rancho Lomas de Santiago, respectively. Other ranchos in Orange County were granted by the Mexican government during the Mexican period in Alta California.
A severe drought in the 1860s devastated the prevailing industry, cattle ranching, much land came into the possession of Richard O'Neill, Sr. James Irvine and other land barons. In 1887, silver was discovered in the Santa Ana Mountains, attracting settlers via the Santa Fe and Southern Pacific Railroads. After several failed attempts in previous sessions, the California legislature passed a bill authorizing the portion of Los Angeles County south of Coyote Creek to hold a referendum on whether to remain part of Los Angeles County or to secede and form a new county to be named “Orange” as directed by the legislature; such referendum required a 2/3 vote for secession to take place, subsequently on June 4th, 1889, the residents south of Coyote Creek voted 2,509 to 500 in favor of secession. After such referendum, Los Angeles County filed three lawsuits in the courts to stall and stop the secession from occurring, but such attempts were futile. On July 17, 1889, a second referendum was held south of the Coyote Creek to determine if the county seat of the to-be county to be in either Anaheim or Santa Ana, along with an election for every county officer.
In the end, Santa Ana defeated Anaheim in such referendum and elected right leaning officers, with some, including one of the primary lobbyists for the creation of the county, Henry W. Head, elected to the Board of Supervisors while being a member of the Ku Klux Klan, with Head’s son, Horace Head, elected as District Attorney of the soon to be county, known to, as stated by the OC Weekly, threaten “...any Mexicans who walked in front of their homes with shotguns when not burning crosses on front lawns,” along with Horace Head supporting and defending his fathers affiliation with the Ku Klux Klan. With the referendum taken place, the County of Orange was incorporated on August 1st, 1889, as prescribed by state law. Since the date of the incorporation of the county, the only geographical changes to have occurred which affected Orange County was when the County and Los Angeles County agreed to trade land around Coyote Creek to adjust the border of the two counties to conform with city blocks.
The county is said to have been named for the
Yorba Linda, California
Yorba Linda is a suburban city in Orange County, California 37 miles southeast of Downtown Los Angeles. The suburb's most famous resident was Richard Nixon, his birthplace is a National Historic Landmark, at his presidential library and museum located there. Yorba Linda is part of the Los Angeles metropolitan area according to the US Census; as of the 2010 census, its population was 64,234. This area was the home of the Luiseño, Juaneño Indians at one time. In 1834, Jose Antonio Yorba's most successful son, Bernardo Yorba, was granted the 13,328-acre Rancho Cañón de Santa Ana by Mexican governor José Figueroa. Most of this original land was retained after the Mexican–American War in 1848 by descendants of the Yorba family. A portion of the city's land is still owned and developed by descendants of Samuel Kraemer, who acquired it through his marriage to Angelina Yorba, the great-granddaughter of Bernardo Yorba; the site of the Bernardo Yorba Hacienda, referred to as the Don Bernardo Yorba Ranch House Site, is listed as a California Historical Landmark.
Near that same site sits the second oldest private cemetery in the county, the historic Yorba Cemetery. The land was given to the Roman Catholic Archdiocese of Los Angeles by Bernardo Yorba in 1858 since Orange County was not established out of Los Angeles County as a separate county until 1889; the cemetery was subsequently vandalized. A section of the land was sold in 1907 by the Yorba family to Fullerton businessman Jacob Stern, who used the land for barley fields and sheep grazing. Stern subsequently sold the tract to the Janss Investment Company, which first called the area Yorba Linda, proceeded to subdivide the land and sell it for agriculture and manufacturing. In 1910, the agricultural aspect of that endeavor materialized, the first of many lemon and orange groves were planted: at the time, the population was still less than 50. A year The Pacific Telephone & Telegraph Company began serving Yorba Linda, the first school was constructed. In 1912, several things happened in Yorba Linda: it received its first post office.
The area that would become downtown was connected to Los Angeles by the Pacific Electric Railway in 1912 for citrus transport. In 1913, Richard Nixon was born in Yorba Linda, the chamber of commerce was set up, a library opened as part of the school, avocado trees were first planted. A year a separate district was established for the library system. In 1915, the Susanna Bixby Bryant Ranch house was constructed, it is a museum, open to the public. In 1917, the first street was paved, Yorba Linda Boulevard; the Yorba Linda Star began publication also. It has since become an online section of the OC Register. A printed version of the Star is available at various city buildings free of charge and is delivered to every household in Yorba Linda each Thursday. Past articles are on microfilm at the Yorba Linda Public Library; the population exceeded 300 for the first time prior to 1920. In 1929, the citrus association's packing house burned down, it reopened the next year. During this period, the eastern two-thirds of Yorba Linda remained part of cattle and agricultural ranches controlled by pioneer families such as the Yorba, de los Reyes, Travis, Dominguez and Bryant ranches.
The small town had grown by the 1960s, with more than 1,000 residents by the 1960 Census. Three annexation attempts were made by adjoining cities: Brea in 1958 and Anaheim and Placentia in 1963; these experiences culminated in incorporation, which occurred in 1967. The new city implemented a municipal general plan in 1972. By the 1980 Census, the population was nearing 30,000. Within ten years it exceeded 50,000. In 1990, the Birthplace of Richard Nixon opened as museum, it would become a federal presidential library. In 1994, the community center opened. With over 20,000 housing units in the city as of 2016, many residents now oppose further urban development and have organized to reduce traffic congestion; the Yorba Linda Preservation Foundation seeks to protect historical buildings in the city. In 2005, CNN ranked Yorba Linda 21st among the best places in the U. S. to live. In 2012, Yorba Linda was ranked 42nd on Money magazine's list of America's best small cities. In an article by CNN Money, Yorba Linda was one of the richest U.
S. cities and the richest in Orange County as reported by the Census data, showing a median household income of more than $120K: "Among towns of between 65,000 and 250,000 in population, Yorba Linda, where six-figure incomes are the rule, had the highest median income at $121,075". Yorba Linda has been identified as one of the richest cities in the U. S. by the U. S. Census Bureau, which shows a median household income of $121,075, higher than any other city in 2006. In 2007, Yorba Linda High School broke ground after many years of planning. In November 2008, eastern Yorba Linda suffered from fires that destroyed 113 homes and damaged 50 others; the destruction was due to erratic winds causing embers to fly up to half a mile away. On February 3, 2019 at 1:45 pm a twin engine 1981 Cessna on route from Fullerton Municipal Airport to Nevada crashed from 7500 ft into a single family residence in the 19700 block of Crestknoll Drive near Glenknoll Eleme
National Highway System (United States)
The National Highway System is a network of strategic highways within the United States, including the Interstate Highway System and other roads serving major airports, rail or truck terminals, railway stations, pipeline terminals and other strategic transport facilities. Altogether, it constitutes the largest highway system in the world. Individual states are encouraged to focus federal funds on improving the efficiency and safety of this network; the roads within the system were identified by the United States Department of Transportation in cooperation with the states, local officials, metropolitan planning organizations and approved by the United States Congress in 1995. The Intermodal Surface Transportation Efficiency Act of 1991 provided that certain key routes such as the Interstate Highway System, be included; the National Highway System Designation Act of 1995 is a United States Act of Congress, signed into law by President Bill Clinton on November 28, 1995. The legislation designated about 160,955 miles of roads, including the Interstate Highway System, as the NHS.
Aside from designating the system, the act served several other purposes, including restoring $5.4 billion in funding to state highway departments, giving Congress the power to prioritize highway system projects, repealing all federal speed limit controls, prohibits the federal government from requiring states to use federal-aid highway funds to convert existing signs or purchase new signs with metric units. The act created a State Infrastructure Bank pilot program. Ten states were chosen in 1996 for this new method of road financing; these banks would lend money like regular banks, with funding coming from the federal government or the private sector, they would be repaid through such means as highway tolls or taxes. In 1997, 28 more states asked to be part of the program. Ohio was the first state to use a state infrastructure bank to start building a road. An advantage to this method was completing projects faster. According to the Federal Highway Administration, the 160,000-mile National Highway System includes roads important to the United States' economy and mobility, from one or more of the following road networks: Interstate Highway System: The entire Interstate Highway System is included in the NHS, but retains its separate identity within the NHS.
Other Principal Arterials: Highways in rural and urban areas which provide access between an arterial and a major port, public transportation facility, or other intermodal transportation facility. Strategic Highway Network: The entire network of highways which are important to the United States’ strategic defense policy and which provide defense access and emergency capabilities for defense purposes. Major Strategic Highway Network Connectors: Highways which provide access between major military installations and routes which are part of STRAHNET. Intermodal Conectors: Routes which provide access between major intermodal facilities and the other four subsystems making up the NHS; the system includes 4% of the nation's roads, but carries more than 40% of all highway traffic, 75% of heavy truck traffic, 90% of tourist traffic. All urban areas with a population of over 50,000 and about 90% of America's population live within 5 miles of the network, the longest in the world. U. S. Roads portal This article incorporates public domain material from websites or documents of the United States Department of Transportation.
STRAHNET description at US military's Transportation Engineering Agency STRAHNET article at the GlobalSecurity.org Weingroff, Richard F. "Backbone: Creation Of The National Highway System" National Highways System Proposed in 1913 State-by-state maps of the National Highway System of the Federal Highway Administration
California State Route 90
State Route 90 is a state highway in Southern California, United States. It consists of two unconnected pieces in Greater Los Angeles; the Marina Freeway segment is a short freeway in southwestern Los Angeles and the nearby suburbs, linking Marina del Rey to the rest of Greater Los Angeles. The limited-access portion runs from Slauson Avenue in southern Culver City to just past Culver Boulevard, where it forms the approximate border between the Del Rey and Westchester neighborhoods of the city of Los Angeles; the route continues westward into unincorporated Marina del Rey as an expressway, terminating at Lincoln Boulevard. The eastern portion of SR 90 is Imperial Highway connecting La Habra, Yorba Linda, Anaheim Hills. A stretch in Yorba Linda between Yorba Linda Boulevard and Orangethorpe Avenue was relinquished to the city in 2002 and built to freeway standards; the city renamed it the Richard M. Nixon Freeway in honor of the 37th President of the United States, Richard Nixon, born in Yorba Linda less than half a mile away from the road.
The west segment of SR 90 begins at Lincoln Boulevard in the Del Rey district of Los Angeles. It heads east along the Marina Expressway, past several intersections, becomes the Marina Freeway after crossing Ballona Creek. After two interchanges - with Centinela Avenue and Interstate 405 - SR 90 and the freeway end at Slauson Avenue; the east segment begins at Beach Boulevard in La Habra. It heads east and southeast on Imperial Highway, ending at State Route 91 about 1⁄4 mile after crossing the Santa Ana River from Yorba Linda into Anaheim. A portion of the road in Yorba Linda is built to freeway standards. However, the same state law that authorized relinquishment required the city to "maintain signs directing motorists to the continuation of Route 90". SR 90 is part of the California Freeway and Expressway System, is part of the National Highway System, a network of highways that are considered essential to the country's economy and mobility by the Federal Highway Administration. Legislative Route 221 was defined in 1947 to run from pre-1964 Legislative Route 60 east to pre-1964 Legislative Route 165.
A 1959 extension took it east to pre-1964 Legislative Route 170. To the east, Legislative Route 176 was defined in 1939 from pre-1964 Legislative Route 62 east and southeast to pre-1964 Legislative Route 43. A 1959 extension took it west to pre-1964 Legislative Route 174 near Norwalk. In the 1964 renumbering, LR 221 was assigned State Route 90, but LR 176 all became part of State Route 42, along with the connecting LR 174 to the west; the piece of LR 176 between I-605 and SR 39 was reassigned to SR 90 in 1965, the rest east to SR 91 became part of SR 90 in 1968. Planned as the Slauson Freeway, Route 90 was slated to extend across southern Los Angeles County and northern Orange County, ending at the Riverside Freeway in eastern Anaheim. However, by the 1960s, community opposition had reduced it to what is a minor spur of I-405 to Marina Del Rey, it was renamed the Richard M. Nixon Freeway for a brief period in the early 1970s, but after Nixon's resignation in the wake of the Watergate scandal, its name was changed to the current appellation.
From I-405 west to Centinela Avenue, the Marina Freeway is 8 lanes wide, before it narrows to 4 lanes at the Culver Boulevard exit. The freeway ends 1⁄2 mile west of Culver Boulevard, continues as an expressway. There has been talk of extending the Marina Expressway west of Lincoln Boulevard to Admiralty Way to accommodate ongoing expansion of the Marina Del Rey area. Strong opposition to this makes actualization of this plan uncertain. There were once plans to connect the two sections via the Slauson Freeway and Yorba Linda Freeway parallel to Slauson Avenue, but this was never built; the full route was added to the California Freeway and Expressway System in 1959. In 2002 the City of Yorba Linda assumed responsibility for Imperial Highway to complete various construction projects within city limits when the State Assembly passed AB 887. By 2005, construction on the western end of the Marina Freeway began, to extend the freeway terminus from Culver Boulevard to 1⁄2 mile west of Culver Boulevard by building a full interchange at Culver.
The freeway extension was completed in early 2007. The freeway extension allows Route 90 drivers to avoid a traffic signal at Alla Road. After the end of the freeway, a pair of frontage roads operating as an expressway continues as Route 90 up to Route 1. Signalized intersections occur at Mindanao Way and Lincoln Boulevard, the end of the expressway in Marina del Rey; the reason for the extension is to relieve traffic congestion on surface streets. Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, do not reflect current mileage. R reflects a realignment in the route since M indicates a second realignment, L refers an overlap due to a correction or change, T indicates postmiles classified as tempora