Intermittent State Route 20 Closures Scheduled this Season Bridge Construction at the Interstate 80 Junction

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

Nevada County - Caltrans is alerting motorists about the need for intermittent closures of eastbound State Route 20 (SR 20) for construction of the new bridge at the junction of Interstate 80 (I-80). The work is part of the $112 million Yuba Pass Separation Overhead Bridge Project.

Eastbound SR 20 closures will take place intermittently during the summer and fall months. Exact dates and times are still to be determined, and motorists will be notified as soon as that information becomes available.

The closures are needed for public safety during a variety of construction activities, including falsework installation and removal, crane mobilization and demobilization, and concrete pours. Crews will perform flagging operations along SR 20 at the I-80 junction, whenever possible, in an effort to keep the highway open.

Motorists can expect delays and are encouraged to factor in additional travel time for the suggested detours. The schedule is subject to change or be delayed due to weather, availability of materials or other unexpected events.

When closed, eastbound traffic will be turned around at the Omega Scenic Overlook with access restricted unless needed for local residents and emergency vehicles. The hard closure will be located at the I-80 junction. Westbound SR 20 will remain open for travel between Truckee and the Nevada City/Grass Valley area.

Motorists looking to connect to I-80 from eastbound SR 20 will follow the same detour as previously used during bridge demolition.

Detour:

• Southbound State Route 49 (SR 49) to connect with I-80 in Auburn
• Passenger vehicles may also detour southbound on State Route 174 to connect with I-80 in Colfax.
• Large trucks are directed to use SR 49 only.

Additionally, the eastbound I-80 off-ramp to westbound SR 20 will be closed. Motorists will detour along eastbound I-80 to Eagle Lakes Road, then head back westbound on I-80 and take the off-ramp to westbound SR 20.

The project will also construct median barriers, upgrade drainage and install 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.

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