March 22nd through May 31st 7:00 PM to 6:00 AM
Starting Sunday, March 22
Napa County – Caltrans will conduct overnight lane, ramp, and shoulder closures at various locations along State Routes 12 (SR 12) and State Route 29(SR 29) in Napa, Napa County. The closures are necessary to allow crews to safely upgrade roadway signs, which includes both the replacement of existing signs and enhancements to improve overall signage visibility. The scheduled work will begin on Sunday, March 22 from 7:00 PM to 6:00 AM, focusing first on the intersection of SR12 near Airport Boulevard and on SR 29 between Lincoln Avenue and West Imola Avenue. Changeable Message Signs (CMS) will alert drivers ahead of closures. Motorists should expect delays, reduce speed, and plan extra travel time. Please use caution and be prepared for possible merging traffic near work zones.
Closure Information Sunday – Thursday 7:00 PM – 6:00 AM:
- Sunday, March 22, 2026, through Sunday, May 31, 2026
Locations:
- SR-12 near Airport Boulevard
- SR-29 between Lincoln Avenue & West Imola Avenue
*All work is weather dependent and subject to change*
For 24/7 traffic updates, follow 511.org: https://twitter.com/511SFBAY
Real-time traffic, click-on Caltrans Quick Map: http://quickmap.dot.ca.gov/