State Route 24 (SR-24) Caldecott Tunnel Overnight Closure Bore #3 Maintenance Work

Monday September 15th through Wednesday September 17th 10:00 PM-4:30 AM

Alameda And Contra Costa Counties - Caltrans has scheduled overnight closures of Bore 3 of the Caldecott Tunnel on Westbound State Route 24 (SR-24) for tunnel washing and maintenance.

Starting Monday, September 15, 2025, through Wednesday, September 17, 2025, from 10:00 PM to 4:30 AM each night. Bore 3 of the Caldecott Tunnel on Westbound State Route 24 (SR-24) for tunnel washing and maintenance. During the work, all other bores in each direction will remain open.

All work is weather dependent.

Traffic Control Measures:
Changeable message signs will be in place to assist motorists traveling in the area. Motorists are advised to expect delays and allow extra time. Please drive with caution through the construction zone. Slow for the Cone Zone.

For 24/7 traffic updates, please visit 511.org: https://x.com/511SFBay For real-time information, visit Caltrans QuickMap: https://quickmap.dot.ca.gov Follow us on X: https://x.com/CaltransD4 Or call 1-800-472-7623, 1-800-427-ROAD for state highway conditions statewide.