San Francisco-Oakland Bay Bridge (Westbound I-80) Overnight Lane Closure and Full YBI On Ramp Closure to Place Holiday Wreath

Overnight lane reductions will allow crew and motorists safe access during installation

San Francisco / Treasure Island - Caltrans will place a holiday wreath above the Westbound I-80 entrance to the Yerba Buena Island (YBI) Tunnel on Thursday night, November 12, 11:30 until Friday morning, 4 a.m., November 13. This work will require temporary overnight lane and ramp closures. Only one WB I-80 lane will be accessible and open during this overnight installation process.

Closure Details:

• Lanes 2-5 will lanes closed on Westbound I-80 Bay Bridge, between the metering lights and the YBI Tunnel. At least one lane will remain open at all times.
• Full closure of the YBI On-ramp to Westbound I-80 toward San Francisco. A detour will be in place (see below).

Detour (from Treasure Island/YBI to San Francisco):

1. Take the Eastbound I-80 on-ramp toward Oakland.
2. Stay in the far-left lane and follow signs to the Toll Plaza exit.
3. Follow detour signs to re-enter Westbound I-80 toward San Francisco

Work Schedule:

Thursday, November 12, 11:30 p.m. - Friday, November 13, 4:00 a.m.
(Schedule subject to change due to weather conditions.)

Traffic Impacts:

• During this work, motorists traveling from Treasure Island/YBI to San Francisco will not have direct access through the tunnel.
• Drivers will be temporarily detoured toward Oakland, then redirected at the Toll Plaza to return Westbound toward San Francisco.

Caltrans will have detour signage and traffic control personnel in place to guide motorists. Delays are expected, and drivers are encouraged to allow extra travel time. Caltrans thanks the public for its patience as we safely complete this seasonal installation.

Traffic Impacts

Drivers should anticipate:

• Overnight delays due to reduced lane capacity
• Slower traffic flow near active work zones
• Possible temporary noise and construction lighting during overnight hours

Schedule

• Work Begins: Thursday, November 12
• Work Hours: Overnight (11:30 p.m. - 4:00 a.m.)
• Duration: One night

Traveler Information

• Check QuickMap (quickmap.dot.ca.gov) for real-time conditions
• Follow Caltrans District 4 on social media for updates
• Allow extra travel time if crossing the bridge overnight

Stay Informed

For the latest updates visit sfhighwayprojects.com where Caltrans will continue to provide updates as schedules are confirmed. Motorists should check back regularly for the latest construction information, traffic impacts, and detour details.