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Southern California (commonly shortened to SoCal) is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California.Its densely populated coastal region includes Greater Los Angeles (the second-most populous urban agglomeration in the United States) [4] [5] and San Diego County (the second-most populous county in California).
Therefore, the county routes are sorted alphabetically, from the northernmost region of California to the southernmost region. Routes with letters (A, B, D) are in the region of Northern California , letters (E, G, J) are in Central California , and (N, R, S) are in Southern California .
During World War II, transportation bottlenecks on Southern California roads and railways convinced many that if Southern California was to accommodate a large population, it needed a completely new transportation system. The city of Los Angeles favored an upgraded rail transit system focused on its central city.
The south of Tulare County was later organized as Kern County in 1866, with additions from Los Angeles and San Bernardino counties. Coso County was created in 1864 by the California State Legislature out of territory of Mono County and Tulare County on the east slope of the Sierra Nevada but was never officially organized.
Each state highway in California is maintained by the California Department of Transportation (Caltrans) and is assigned a Route (officially State Highway Route [3] [4]) number in the Streets and Highways Code (Sections 300-635).
The following is a list of roads defined by the Streets and Highways Code, sections 250–257, as part of the California Freeway and Expressway System. [1] Some of the routes listed may still be in the planning stages of being fully upgraded to freeways or expressways. State Route 1 (part) State Route 2 (part) State Route 3 (part) State Route 4 ...
The state highway system of the U.S. state of California is a network of highways that are owned and maintained by the California Department of Transportation (Caltrans).. Each highway is assigned a Route (officially State Highway Route [1] [2]) number in the Streets and Highways Code (Sections 300–635).
Cities in Southern California: located in Imperial, Los Angeles, Orange, San Bernardino, San Diego, Santa Barbara, San Luis Obispo, Riverside, and Ventura Counties. v t