State Routes 20/49 South - Nevada City to Grass Valley

Exit 186 departs immediately south of the merge between SR 20 west / 49 south for Coyote Street (SR 20 Business/49 Business) to Downtown Nevada City.

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Constructed in the 1960s, the Golden Center Freeway leads SR 20 west / 49 south 5.1 miles to Empire Street in the city of Grass Valley.

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Back to back half diamond interchanges add traffic from Broad Street and Sacramento Streets to the Golden Center Freeway westbound in Nevada City.

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Heading through south Nevada City, SR 20/49 approach the unincorporated community of Gold Flat at Exit 185.

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The Grass Valley city center lies four miles further. Beyond their separation, SR 20 turns west to Marysville while SR 49 continues another 23 miles to Auburn.

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Entering the diamond interchange (Exit 185) with Gold Flat Road east and Ridge Road west on SR 20/49.

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Banner Lava Cap Road spans the Golden Center Freeway high above SR 20/49, a half mile ahead of Exit 183B for Brunswick Road.

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A six-ramp parclo interchange (Exit 183B) joins SR 20/49 with a sprawling retail corridor along Brunswick Road and parallel Main Street.

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Auxiliary lanes expand the Golden Center Freeway between Brunswick Road and Dorsey Drive (Exit 183A). The forthcoming diamond interchange opened to traffic on November 10, 2014.¹

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Groundbreaking for the $15 million Dorsey Drive Interchange took place on April 29, 2013. The two-phase project widened Dorsey Drive to five lanes and improved 1.4 miles of SR 20/49. Aesthetic enhancements were added to concrete bridge walls, railings and street lighting. 1,272 linear feet of sound walls matching the project color scheme were installed as well.²

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The ensuing exit joins SR 20 west / 49 south with East Main Street in Grass Valley.

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An auxiliary lane opens westbound from Dorsey Drive to Exit 182B for East Main Street and Idaho Maryland Road east.

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Exit 182B ties into a roundabout with East Main Street and Idaho Maryland Road. The roundabout was completed in 2008.

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The north end of SR 174 ties into SR 20/49 (Golden Center Freeway) at Exit 182A. Truckers are not advised along the 13.3 mile long state route south to Colfax.

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A split diamond interchange (Exit 182A) joins SR 20 west / 49 south with Bennett Street, Bank Street and SR 174 (Colfax Avenue) east by Downtown Grass Valley.

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A service road (Tinloy Street) links the westbound off-ramp at Exit 182A with SR 174 (Colfax Avenue) east and Auburn Street (SR 20 Business/49 Business). The city of Colfax lies at the south end of SR 174 along Interstate 80.

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SR 20 west and SR 49 south part ways 0.75 miles southwest of the Bennett Street underpass in Grass Valley.

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SR 20 branches west from SR 49 (Golden Center Freeway) to Penn Valley midway between Grass Valley and the Yuba County line.

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Advancing south to Boston Ravine, a third lane opens from the SR 174 entrance ramp to the diamond interchange with Empire Street.

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SR 20 west and SR 49 south split at Empire Street. Empire Street ties in from Auburn Street (SR 49 Business) and Empire Mine State Historic Park to the east.

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