| List Of California State Routes |
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to honor the California Gold Rush .]] Each . Most of these are numbered in a statewide system, and are known as ''State Route X'' (abbreviated ''SR-X''). United States Numbered Highways are labeled ''US X'', and Interstate Highway s are ''Interstate X'', though Caltrans typically uses ''Route X'' for all classes. Since July 1 of 1964, the majority of ''legislative route numbers'', those defined in the Streets and Highways Code, match the ''sign route numbers''. On the other hand, some short routes are instead signed as parts of other routes - for instance, Route 112 and Route 260 are signed as part of the longer State Route 61 , and Route 51 is part of Interstate 80 Business . and State Route 180S , among others, spurs) Current or former unsigned suffixed routes include State Route 156U , signed as State Route 156 Business through Hollister , and State Route 180S , the freeway replacement for State Route 180 in Fresno (now signed as SR 180). HISTORY (red) and California State Automobile Association (blue)]] The first legislative routes were defined by the State Highway Bond Act in 1909. These, and later extensions to the system, were numbered sequentially. No signs were erected for these routes. The United States Numbered Highways were assigned by the American Association Of State Highway Officials (AASHO) in November 1926 , but they were not posted in California until January 1928 . These were assigned to some of the main legislative routes in California. Signs were posted by the Automobile Club Of Southern California and California State Automobile Association , which had been active in signing National Auto Trail s and local roads since the mid-1900s. After a large expansion of the system in 1933, sign route numbers were assigned in 1934. These were assigned in a geographical system, completely independent of the legislative routes. Odd-numbered routes ran north-south and even-numbered routes ran east-west. The routes were split among southern California (ACSC) and central and northern California (CSAA) as follows:
For instance, State Route 1 and State Route 4 were in central and northern California, and State Route 2 and State Route 3 (since moved) were in southern California. A rough grid was used inside the two regions, with the largest numbers - all less than 200 (except for State Route 740 , which was related to State Route 74 ) - in eastern California (north-south) and near the border between the two regions (east-west). See Also: 1964 state highway renumbering (California) The Interstate Highway System numbers were assigned by AASHO in late 1959. In 1963 and 1964, a total renumbering of the legislative routes was made, aligning them with the sign routes. Some changes were also made with the sign routes, mostly related to decommissionings of U.S. Routes in favor of Interstates. Since the 1990s, many non- Freeway routes, especially in Urban Area s, have been deleted and turned over to local control. Not all cities have been prepared to accept such routes from Caltrans simultaneously, so many have been decommissioned from the state system one fragment at a time. LIST OF ROUTES Routes 1-99 Routes 100-199 Routes 200-299 Routes 330-905 Interstates Auxiliary Interstates ;Interstate 5 ;Interstate 10 ;Interstate 15 ;Interstate 80 Business Routes ;Interstate 5 ;Interstate 80 U.S. Routes Former U.S. Routes looking south at Mono Lake ]]
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