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Eastbound State Route 20 Closure Extended

Published:

California State Route 20

District: District 3 - Marysville
Sergio Aceves, District 3 Director
Contact: Jeremy Linder (530) 701-5209

Placer/Nevada Counties – Caltrans is reminding motorists of a scheduled closure of eastbound State Route 20 (SR 20) this month between the Omega Scenic Overlook and the Interstate 80 (I-80) junction as part of the $112 million Yuba Pass Separation Overhead Bridge Project.
 
Eastbound SR 20 is now scheduled to be closed through 6 a.m. Friday, September 4. Crews are installing falsework for the section of the new westbound I-80 bridge that crosses over SR 20.
 
The eastbound I-80 off-ramp to SR 20 will also be closed during this time. Westbound SR 20 will remain open for travel between the I-80 junction and Nevada City. The schedule is subject to change or be delayed due to weather, availability of materials or other unexpected events.
 
The following detours are available for motorists:
  • Drivers in the Nevada City/Grass Valley area looking to connect to I-80 will detour southbound on State Route 49 (SR 49) to connect with I-80 in Auburn or southbound on State Route 174 to connect with I-80 in Colfax. Large trucks are directed to only use SR 49.
  • Eastbound I-80 motorists looking to connect to SR 20 will detour to Eagle Lakes Road and head back on westbound I-80 to reach the westbound SR 20 off-ramp.
   A Caltrans map showing the Yuba Pass Separation Overhead Bridge Construction and an eastbound State Route 20 closure. The map highlights a red segment of eastbound SR‑20 near Emigrant Gap marked with a “1” indicating the closure. Two detour routes are shown: a purple route labeled “2” for passenger vehicles only using SR‑174 to I‑80, and a green route labeled “3” for all vehicles using SR‑49 south to Bell Road and then to I‑80. Surrounding towns such as Grass Valley, Nevada City, Colfax, Auburn, Kingvale, and Truckee are displayed. A legend explains the route label.Aerial view of a highway bridge construction site in a forested mountain area. A new bridge deck is being formed with wooden framing and green rebar beneath an elevated roadway carrying traffic. Construction materials and equipment are staged around the site, with rocky slopes and tall pine trees in the background.Aerial view of a highway construction area beside a forested mountainside. Heavy equipment and trucks work on grading a wide dirt section parallel to the roadway, while vehicles travel on the adjacent highway. Trees line the slope on the right under clear morning light.

    

The extended lane closures will help minimize the duration of the work and improve worker safety. Additional closures are scheduled through October. 

Flatiron Dragados of Concord is the prime contractor. The project will replace the existing bridge and improve freight efficiency along I-80 by increasing the load-carrying capacity for extra-legal load trucks. The project will also include construction of median barriers, upgrade drainage and installation of roadway weather information systems. Work is expected to be completed by winter 2027.

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 issues construction updates on X @CaltransDist3 and on Facebook at CaltransDistrict3. For real-time traffic, click on Caltrans’ QuickMap or download the QuickMap app from the App Store or Google Play.