California State Route 12
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| Route information | ||||
| Defined by | ||||
| Maintained by Caltrans | ||||
| Length: | 140.64 mi (226.34 km) | |||
| Existed: | 1934 – present | |||
| Major junctions | ||||
| West end: |
 SR 116 in Sebastopol
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 US 101 in Santa Rosa  SR 29 / SR 121 near Napa I-80 near Fairfield I-680 near Fairfield SR 160 in Rio Vista I-5 in Lodi SR 99 in Lodi SR 88 near Lodi
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| East end: |
 SR 49 near San Andreas
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State Route 12 (SR 12) is a state highway in the U.S. state of California that travels in an east–west direction from Sebastopol in Sonoma County to State Route 49 just north of San Andreas in Calaveras County. It is constructed to freeway standards from the Fulton Road/South Wright Road stoplight in Santa Rosa, to its partial interchange with Farmers Lane (also in Santa Rosa).
State Route 12 is part of the California Freeway and Expressway System and is eligible for the State Scenic Highway System, however, it is only designated as a scenic highway from its intersection with Danielli Avenue east of Santa Rosa to its junction with London Way near Agua Caliente.
SR 12 has been designated by various state laws and through local usage as the Valley of the Moon Scenic Route (the portion running through Sonoma County, though the first sign with this name is at the intersection of Farmers Lane and Fourth Street in Santa Rosa);Luther Burbank Memorial Highway from Santa Rosa to Sebastopol (after botanist Luther Burbank). SR 12 is also known as Sonoma Highway between Santa Rosa and the west side of the city of Sonoma; Broadway between Sonoma Plaza and its junction with SR 121 in Schellville; Carneros Highway for the length of its concurrency with 121 between Schellville and its junction and the north end of its concurrency with SR 29 near Napa;Jameson Canyon Road from where its concurrency with SR 29 ends in American Canyon to its junction with I-80 in Cordelia; and Rio Vista Highway from I-80 to SR 160 east of Rio Vista, and informally as "Blood Alley" from Lodi to Fairfield. The segment through Lodi to the overlap with SR 99 is on Kettleman Lane.
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