Alameda County — Caltrans has scheduled overnight closures of the Webster Tube (State Route 61) starting tonight Monday July 7th through Wednesday 9th 10:00PM to 4:30AM each night, for tunnel maintenance. The closures will take place overnight, and the tube will remain open during the daytime.
Closure Details
- Monday, July 7, 2025 – 10:00 PM to 4:30 AM
- Tuesday, July 8, 2025 – 10:00 PM to 4:30 AM
- Wednesday, July 9, 2025 – 10:00 PM to 4:30 AM
Traffic Control & Detour Information
- During closures, motorists are encouraged to use the Posey Tube as an alternate route.
- Changeable message and directional signs will be in place to assist drivers.
- The California Highway Patrol (CHP) will be onsite to support traffic management.
Important Notes
- The tunnel will remain open during the daytime hours; closures are nighttime only.
- Work is weather dependent.
Caltrans thanks motorists for their patience as we perform this essential maintenance work.
Be Work Zone Alert and expect travel delays.
Caltrans will update its X page at https://twitter.com/CaltransD4 on the latest highway conditions, and drivers are encouraged to check out Caltrans Quickmap http://quickmap.dot.ca.gov/
Motorists can also receive 24/7 highway condition information statewide by calling 1-800-427-ROAD or 1-800-427-7623.
Thank you for your patience as we work to maintain our state’s highways, bridges, and tunnels.
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