State Route 20 Now Open in Nevada County


California State Route 20

District: District 3 - Marysville
Amarjeet S. Benipal, District Director                        
Contact: Jeremy Linder
Phone: (530) 701-5209


Nevada County – Caltrans is alerting motorists that State Route 20 (SR-20) is now open 11 miles east of Nevada City in Nevada County after being closed for 12 days as part of the ongoing $54.6 million Omega Curves Safety Project. 

Motorists are reminded one-way traffic controls remain in effect at both the White Cloud and Lowell Hill segments. Work is scheduled to take place from 6 a.m. to 8 p.m. Monday through Saturday, with occasional work on Sundays, through mid-November.

Crews are finishing paving operations and installing guardrail to prepare the roadway for the winter season. During the closure, crews constructed tie-in locations to divert the traveling public from the former roadway to the new alignment. 


image of sr20 finish paving    image of sr20 installing guardrail

The schedule is subject to change or be delayed due to weather, availability of materials or other unexpected events.

The project will improve safety and reduce collisions on SR-20 by realigning curves on two non-continuous segments near White Cloud and Lowell Hill, widening shoulders, improving the highway’s sight distance, and adding designated left-turn lanes near Conservation Road and Washington Road. In addition, three turnouts are being constructed so that slow-moving vehicles can allow motorists to safely pass, while also serving as traffic-enforcement locations for the California Highway Patrol.


map of route 20

Granite Construction, Inc. of Sacramento is the prime contractor for the Omega Curves Safety Project, which is expected to be completed later this fall. For project updates, please visit

Caltrans District 3 is responsible for maintaining and operating 4,385 lane miles in 11 Sacramento Valley and Northern Sierra counties. Caltrans reminds motorists to “Be Work Zone Alert” and slow in construction zones for the safety of travelers and crews performing these improvements. The department will issue construction updates on @CaltransDist3 and on Facebook CaltransDistrict3. For real-time traffic, click on Caltrans’ QuickMap or download the QuickMap app from the App Store or Google Play.

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