Portal:California Roads

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The California Roads Portal


The highway system of the U.S. state of California is a network of roads owned and maintained by several jurisdictions: 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 Route X for all classes.

I-5 (CA).svg
US 101 (CA).svg

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 (but the lowest numbers are along Mexico and the Gulf of Mexico), and odd-numbered routes are north–south routes (with the lowest numbers along the Pacific Ocean). US 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 and California County Highways are assigned by Caltrans. 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, Route 112 and Route 260 are signed as part of the longer State Route 61, and Route 51 is part of Interstate 80 Business. California County Highways 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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Simpson-Reed redwood grove in Jedediah Smith State Park, along US 199 near Crescent City
U.S. Route 199 (US 199) is a U.S. highway in the U.S. states of California and Oregon. The highway was established in 1926 as a spur of U.S. Route 99, which has since been replaced by Interstate 5 (I-5). US 199 stretches 80 miles (130 km) from US 101 near Crescent City, California, northeast to I-5 in Grants Pass, Oregon. The highway is the northern portion of the Redwood Highway. In Oregon, US 199 is officially known as Redwood Highway No. 25. The majority of the road in California is the Smith River Scenic Byway, a Forest Service Byway. This route is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System. The first roadway, a plank road, from Crescent City was established in May 1858, and before the US 199 designation was applied to the highway, the roadway was designated Highway 25 and Route 1.
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Did you know...

Did you know?

  • ...that the Sierra Highway was described in a promotional book to recruit teachers to California as "a highway with a hundred by-ways, each by-way with a hundred wonders"?

Things you can do

Things you can do
  • Instead of creating new stubs, bump all start articles to C-Class, and to B-Class
  • Improve I-5, I-10, I-15 and I-80 to GA
  • Remember, no stubs!


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