California Department of Transportation

07/15/2026 | Press release | Distributed by Public on 07/15/2026 18:22

Update: Overnight lane closures on SR 121/Monticello Road for Erosion Repairs in Napa County

Update: Overnight lane closures on SR 121/Monticello Road for Erosion Repairs in Napa County

Published: Jul 15, 2026

Thursday, July 16 through Tuesday July 21 - 5:00 PM to 6:00 AM

Napa County - Caltrans has planned overnight lane closures with one-lane traffic control on State Route 121(SR 121)/ Monticello Road in Napa County. The lane closures are required to allow crews to safely complete Erosion Repair activities. Daytime construction activities at the same locations will continue from Monday, June 15 through Monday, August 31.

Construction schedule:

Overnight work - Vichy Springs to Wooden Valley Road
 Thursday, July 16 through Tuesday, July 21
 5:00 PM to 6:00 AM

Daytime work - Vichy Springs to Wooden Valley Road
 Wednesday, July 22 to Monday, August 31
 6:00 AM - 6:00 PM

Daytime work - Circle Oaks Drive to Moskowite Corner
 Monday, June 15 to Monday, August 31
 6:00 AM to 6:00 PM

Changeable message signs in the area will be activated to assist motorists. Please be prepared for possible delays and follow all posted signs while crews carry out these important improvements.

All work is weather dependent.

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/

California Department of Transportation published this content on July 15, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on July 16, 2026 at 00:23 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]