Webster Tube Overnight Closures for Maintenance Work Aug 25-27, 2025

Published on August 25, 2025

FOR IMMEDIATE RELEASE

Webster Tube (State Route 61) Overnight Closures for Maintenance Work

ALAMEDA COUNTY — Caltrans has scheduled overnight closures of the Webster Tube (State Route 61) starting tonight Monday August 25th through Wednesday 27th 10:00PM to 4:30AM each night, for tunnel washing and maintenance. The closures will take place overnight, and the tube will remain open during the daytime.

Closure Details
• Monday, August 25, 2025 – 10:00 PM to 4:30 AM
• Tuesday, August 26, 2025 – 10:00 PM to 4:30 AM
• Wednesday, August 27, 2025 – 10:00 PM to 4:30 AM

Traffic Control & Detour Information
• 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.

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.