ALAMEDA AND CONTRA COSTA COUNTIES – Caltrans has scheduled overnight closures of the Caldecott Tunnel on eastbound State Route 24 (SR-24) for inspecting roadway drains and tunnel maintenance of bore #1 and bore #2.
Bore #1 Closure
- Monday, October 6, 2025 –will be closed from 10:00 PM to 4:30 AM
Bore# 2 Closure
- Tuesday, October 7, 2025 –will be closed from 10:00 PM to 4:30 AM
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.
Other Upcoming Work:
Caltrans has scheduled a 60-hour weekend closure of the southbound State Route 160 (SR-160) auxiliary lane between Wilbur Avenue and East 18th Street/Main Street. The closure will begin Friday, October 10, 2025, at 5:00 PM and remain in effect until Monday, October 13, 2025, at 5:00 AM. Please be advised that Wilbur Avenue On-Ramp to SB SR-160 and Main Street Off-Ramp on SB SR-160 will remain closed throughout the closure. This extended closure is required to safely and efficiently complete construction activities in the area.
Detour Information
For SB Route 160 to E 18th St./Main St. (Off-Ramp Closed)
- Exit on Wilbur Avenue Off-Ramp
- Right on Wilbur Avenue
- Left on Viera Avenue
- Left on E 18th Street
For Wilbur Avenue to SB Route 160 On-Ramp (Closed)
Eastbound Wilbur Avenue
- Right on Viera Avenue
- Left on E 18th Street
- Right on Main Street On-Ramp to SB Route 160
Westbound Wilbur Avenue
- Continue on Wilbur Avenue
- Left on Viera Avenue
- Left on E 18th Street
- Right on Main Street On-Ramp to SB Route 160
Detour signs will be posted, and Changeable Message Signs (CMS) will alert drivers of the closure. Drivers should expect delays, allow extra travel time, and exercise caution while navigating the detours. All work is weather-permitted. Caltrans appreciates the public’s patience and cooperation while crews perform this critical work. For real-time traffic, click on Caltrans QuickMap: http://quickmap.dot.ca.gov/
