Portal:California roads
The California Roads Portal
The highway system of California is a network of roads owned and maintained by the state of California through the California Department of Transportation (Caltrans). 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 Highways are Interstate X, though Caltrans typically uses State Route X for all classes.
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Interstate Highways and U.S. Highways are assigned at the national level. Interstate Highways are numbered in a grid—even-numbered routes are east–west routes (with the lowest numbers along Mexico and the Gulf of Mexico), and odd-numbered routes are north–south routes (with the lowest numbers along the Pacific Ocean). U.S. Highways are also numbered in a grid—even numbered for east–west routes (with the lowest numbers along Canada) and odd numbered for north–south routes (with the lowest numbers along the Atlantic Ocean). There are 21 Interstate Highways in California, ranging from Interstate 5 to Interstate 980. There are seven current U.S. Highways including U.S. Route 6 and U.S. Route 395.
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California State Routes are managed by Caltrans and designated by the California State Legislature. The state route's signs are in the shape of a miner's spade to honor the California Gold Rush. Each state highway in the U.S. state of California is assigned a Route (officially State Highway Route) number in the Streets and Highways Code (Sections 300-635). 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, State Route 112 and State Route 260 are signed as part of the longer State Route 61, and State Route 51 is part of Interstate 80 Business. California County Routes are marked with the usual County route shield, and are assigned a letter for where they are located. For instance, county highways assigned "S" are located in Southern California, ones assigned "J" are found in Central California, and those assigned "A" are located in Northern California.
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The Ridge Route, officially the Castaic-Tejon Route, was a two-lane highway running between Los Angeles and Kern counties in California. Opened in 1915 and paved with concrete between 1917 and 1921, the road was the first paved highway directly linking the Los Angeles Basin with the San Joaquin Valley over the Tejon Pass and the rugged Sierra Pelona Mountains ridge south of Gorman. Most of the road was bypassed in 1933 by the Ridge Route Alternate (then U.S. Route 99), which has since been upgraded to a modern freeway, Interstate 5. The portion of the road within the Angeles National Forest was added to the National Register of Historic Places in 1997 and is closed pending repairs; other remnants of the road still remaining are used by local traffic.
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Did you know...
- ...that, despite being added to California's state highway system in 1933, the portion of State Route 190 over the Sierra Nevada remains unconstructed?
- ...that the design of the Mission Valley Viaduct on Interstate 805 was inspired by the Mission San Diego de Alcalá and recognized by the American Society of Civil Engineers?
- ...that U.S. Route 199 is numbered as a spur of U.S. Route 99, which no longer exists?
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- Los Angeles • San Diego • Southern California • Santa Barbara County • Inland Empire • San Francisco Bay Area
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Featured articles
Good articles
Arroyo Seco Parkway
Bayshore Freeway
California State Route 3
California State Route 7
California State Route 11
California State Route 14
California State Route 16
California State Route 20
California State Route 37
California State Route 46
California State Route 47
California State Route 54
California State Route 55
California State Route 70
California State Route 88
California State Route 98
California State Route 115
California State Route 125
California State Route 133
California State Route 139
California State Route 149
California State Route 160
California State Route 174
California State Route 177
California State Route 186
California State Route 188
California State Route 190
California State Route 195
California State Route 198
California State Route 209
California State Route 243
California State Route 244
California State Route 247
California State Route 266
California State Route 275
California State Route 282
California State Route 905
Interstate 205 (California)
Interstate 680 (California)
Interstate 780
Sierra Highway
U.S. Route 50 in California
U.S. Route 80 in California
U.S. Route 199
U.S. Route 395 in California
Things you can do
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- Improve all California roadways articles to good article or featured article status
- Add reliably sourced content and make sure facts are verifiable
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