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A round, white Botts' dot, surrounded by excess adhesive Botts' dots on Interstate 280, near the Sand Hill Road exit, Menlo Park, California. Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective ceramic [1] raised pavement markers.
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) .
U.S. Route 97 (US 97) is a United States Numbered Highway, stretching from Weed, California to the Canadian border in Oroville, Washington.The California portion of US 97 runs north from I-5 in Weed to the Oregon state line.
Concurrences are not explicitly codified in the Streets and Highways Code; such highway segments are listed on only one of the corresponding legislative route numbers—for example, the I-80/I-580 concurrency, known as the Eastshore Freeway, is only listed under Route 80 in the highway code while the definition of Route 580 is broken into non ...
June McCarroll (June 30, 1867 – March 30, 1954) is credited by the California Department of Transportation with the idea of delineating highways with a painted line to separate lanes of highway traffic, although this claim is disputed by the Federal Highway Administration [1] and the Michigan Department of Transportation [2] as two Michigan men painted centerlines before her. [3]
Most are two-lane highways, and can accommodate high speeds and large volumes of traffic. County routes are typically designated with a letter (A, B, D, E, G, J, N, R, or S, depending on the region of the state, with several counties split between two region prefixes) followed by a number (example: G2 ).
Construction on the highway began in 1928, which involved the boring of three tunnels. Previously, the road was signed as U.S. Route 40 Alternate, crossing the Sierra Nevada at a lower elevation than Donner Pass on US 40, now Interstate 80 (I-80). The road was renumbered SR 70 in the 1964 state highway renumbering. Today, portions of SR 70 have ...
US 50 continues as an undivided highway with one eastbound lane and two westbound lanes until the route reaches the canyon of the South Fork American River at Riverton. The remainder of the highway, which climbs along and out of the canyon, then over the Sierra Nevada at Echo Summit and into the Lake Tahoe Basin, is primarily a two-lane road.