Portal:California roads

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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.

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.

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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State Route 282 (SR 282) is an east–west state highway entirely within the city of Coronado, California. It is a spur of SR 75 and connects the rest of the state highway system with Naval Air Station North Island. The road is part of a link connecting to the metropolitan area of San Diego via SR 75 and the Coronado Bay Bridge. The entire route uses a one-way couplet, with Third Street in the westbound direction and Fourth Street in the eastbound direction. Third and Fourth streets, as part of the Coronado street system, have existed since the 19th century, and were paved in the early 20th century. SR 282 was designated in 1968, around the time the San Diego–Coronado Bridge was opened. Attempts to build first a highway, and later a tunnel, to allow base traffic to bypass the Coronado city streets, were rejected by voters in 1974 and 2010, respectively.

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Avenue of the Giants

Credit: Rschen7754

Avenue of the Giants in Humboldt Redwoods State Park

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Did you know...

...that State Route 70, a National Scenic Byway through California's Feather River Canyon, was constructed using an access road laid out by the Utah Construction Company when it built the Western Pacific Railroad in the canyon?

...that the easternmost part of State Route 20 follows a branch of the historic California Trail, parts of which have been preserved as a National Recreation Trail?

...that U.S. Route 199 is numbered as a spur of U.S. Route 99, which no longer exists?

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Highways • United States • California • U.S. Roads • U.S. Streets • California State Routes

Related projects: Los Angeles • San Diego • Southern California • Santa Barbara County • Inland Empire • San Francisco Bay Area

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