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The current alignment, built in the mid-1980s as a mostly two-lane freeway, continues east across rugged terrain to the city of Grass Valley, where it joins SR 49 on the Golden Center Freeway. The two routes travel northeast to Nevada City , where SR 49 turns northwest and SR 20 resumes its eastward course as a two-lane highway.
SR 49 then continues almost due north out of the Auburn city limits. [3] SR 49 continues north, crossing into Nevada County and passing through Higgins Corner and Forest Springs. SR 49 becomes a freeway and enters the city of Grass Valley, where it then runs concurrently with SR 20 and interchanges with the northern end of SR 174.
State Route 174 (SR 174) is a state highway in the U.S. state of California.The two-lane 13-mile (21 km) highway in the western Sierra Nevada, added to the state highway system in 1933, connects Interstate 80 in Colfax with SR 20/SR 49 in Grass Valley, crossing the Bear River next to a 1924 concrete arch bridge.
Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey.The segment of I-80 in California runs east from San Francisco across the San Francisco–Oakland Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley.
The first paved road across this portion of Nevada was the Victory Highway, designated in Nevada as SR 1. With the formation of the US Numbered Highway System , this route was numbered US 40 . From the formation of the Interstate Highway System , the highway was gradually upgraded to Interstate Highway standards and signed as I-80.
I-80 west (Alan S. Hart Freeway west) / unsigned SR 89 spur to Donner Pass Road – Sacramento: Southern end of I-80 overlap; dumbbell interchange: 14.97 [N 3] 186: Central Truckee (Donner Pass Road) No northbound entrance: 16.29 [N 3] 188A: Truckee (Truckee Way) Northbound exit and southbound entrance: 16.60 [N 3]
Grass Valley is a city in Nevada County, California, United States.As of the 2010 United States Census, its population was 12,860.Situated at roughly 2,500 feet (760 m) in elevation in the western foothills of the Sierra Nevada mountain range, this northern Gold Country city is 57 miles (92 km) by car from Sacramento and 88 miles (142 km) west of Reno.
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 ...