Scheduled Wednesday, April 22, 2026, from 10:00 PM to 4:30 AM
Alameda and Contra Costa Counties – Caltrans is slated to close the Caldecott Tunnel Bore 3 on westbound State Route 24 (SR-24) overnight in Alameda and Contra Costa counties on Wednesday, April 22, 2026. The closure will start at 10:00 PM and end at 4:30 AM the following morning. This closure is necessary for cable relocation and routine maintenance. All other tunnel bores in both directions will remain open to traffic. Please be aware that this schedule depends on weather conditions and may change.
Overnight Bore #3 Closure WB SR-24
- Wednesday, April 22, 2026
- 10:00 PM to 4:30 AM
Traffic Control Measures:
Changeable message signs will help guide drivers passing through this area. Travelers should anticipate possible delays and plan for additional travel time. Exercise caution when driving through the construction zone and remember to reduce your speed and always 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.
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