California Department of Transportation
06/25/2026 | Press release | Distributed by Public on 06/25/2026 19:14
State Route 1-Tom Lantos (Devil’s Slide) Tunnels Annual Safety Inspections
State Route 1-Tom Lantos (Devil's Slide) Tunnels Annual Safety Inspections
Published: Jun 25, 2026
Overnight lane closures July 6 - 9 , 10 p.m. - 4 a.m.
San Mateo County ― Caltrans will conduct its annual mandatory tunnel inspections of the State Route 1 (SR-1) Tom Lantos (Devil's Slide) Tunnels beginning on Monday, July 6 at 10 p.m. In order to safety conduct these critical inspections, crews will implement lane closures and one-way traffic control each night.
Schedule
Lane closures start nightly at 10 p.m. and end the following morning at 4 a.m.
- Monday, July 6
- Tuesday, July 7
- Wednesday, July 8
- Thursday, July 9
During these closures, traffic will be directed through an open tunnel under one-way traffic control. Drivers should expect short delays.
All work is weather dependent. Please drive with caution. Thank you for your patience as we work to maintain our state's highways, bridges, and tunnels.
For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
California Department of Transportation published this content on June 25, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on June 26, 2026 at 01:14 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 If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]