Lane Closures on Howard St and Midday Maintenance on Golden Gate Bridge

Wednesday Traffic and Commute Overview

Commuters in San Francisco should prepare for a mix of infrastructure projects and routine maintenance affecting major arteries today, Wednesday, February 25, 2026. While the morning rush is expected to follow typical patterns, midday and late-night travel will see specific disruptions on the Golden Gate Bridge and the I-80 corridor.

Major Roadwork and Ramp Closures

The Transbay Howard Streetscape Project continues to impact the South of Market area. Drivers should expect intermittent lane closures and delays on Howard Street between The Embarcadero and 4th Street from 7:00 a.m. to 4:00 p.m. Crews are currently installing new safety upgrades and bicycle infrastructure. If you are traveling through this corridor, consider using Folsom or Mission streets as alternatives to avoid construction bottlenecks.

On the freeways, the "Fab 4" rehabilitation projects are in full swing. Motorists on the US-101 Hospital Curve will encounter shifted lanes and temporary barriers. While most heavy work is scheduled for the night, the narrowed lanes can cause sudden congestion during peak hours. Additionally, Caltrans has announced a late-night closure of the Eastbound First Street on-ramp to the Bay Bridge starting at 11:59 p.m. tonight and lasting until 7:00 a.m. Thursday. Late-night travelers should detour to the Harrison Street or 4th Street on-ramps.

Midday Delays on the Golden Gate Bridge

Routine maintenance is scheduled for the Golden Gate Bridge today. As part of a multi-month asphalt and pothole repair project, the center "fast lanes" in both directions are expected to close between 10:00 a.m. and 1:00 p.m. While traffic remains open in both directions, the reduction in available lanes often leads to significant tailbacks for midday travelers. Drivers are encouraged to cross before 10:00 a.m. or after 1:00 p.m. to avoid the 15-to-20-minute delays typically associated with this work.

Public Transit Updates

Muni riders are reminded that the permanent closure of the Potrero Yard for modernization has resulted in ongoing schedule and route adjustments. Notable changes for today include:

• 1X California Express: Inbound morning departures from 33rd Avenue have been moved five minutes earlier to 7:40 a.m. and 7:55 a.m.
• 5 Fulton and 5R Fulton Rapid: Expect a mix of standard and articulated buses; frequency has been adjusted to address crowding.
• 48 Quintara-24th Street: The outbound route now travels via Claremont Boulevard, bypassing West Portal Avenue.

For those using BART, train control modernization work continues. After 7:30 p.m., expect delays of approximately 5 to 7 minutes on trains operating between Millbrae, San Bruno, and SFO. Shuttle service between Millbrae and the airport may also be limited during these hours.