SF BART Protects Transbay Tube With Safety Upgrades
BART to single-track Transbay Tube after 10 p.m. on Jan 17 and Feb 21 for lighting work
BART Transbay Tube Delays Set for Late Saturdays
BART riders traveling between San Francisco and Oakland should expect delays of 20 to 30 minutes on late Saturday nights this winter. The transit agency will single-track through the Transbay Tube after 10 p.m. on January 17 and February 21 for lighting maintenance, officials said. The work affects the underwater tunnel that's critical to connecting the East Bay with San Francisco, and riders planning late-night travel on those dates should add extra time to their trips.
Essential Infrastructure Work
The maintenance focuses on lighting systems within the Transbay Tube, which transit officials said are essential for safety and operations in the underwater tunnel. BART typically schedules major infrastructure work during late-night hours and weekends to minimize disruption to commuters, though officials didn't specify how long the lighting project has been planned or whether additional maintenance dates might be added. The Transbay Tube serves as BART's most critical link, carrying tens of thousands of riders daily between San Francisco and Oakland. Single-tracking requires trains traveling in both directions to share one track, which significantly reduces capacity and increases wait times.
Service Impact Details
The single-tracking will begin at 10 p.m. on both Saturday nights, affecting all transbay routes that use the tube. Officials said riders should expect delays of 20 to 30 minutes during the maintenance window, though they didn't specify when normal service will resume on those nights or whether the work might extend into early Sunday morning. The agency didn't provide details about how many trains typically operate through the tube during late Saturday hours or what the normal headways are during that time period. Transit officials said the lighting maintenance can't be postponed, as it's necessary to maintain safe operations in the tunnel.
January and February Work Windows
BART scheduled the maintenance for January 17 and February 21, 2026, spacing the work dates about five weeks apart. Officials didn't say why those specific dates were chosen or whether the lighting project requires two separate work sessions to complete. The agency typically announces major service disruptions several weeks in advance to give riders time to plan, and these maintenance dates follow that pattern. Whether additional maintenance windows might be needed beyond the two announced dates wasn't clear from available information.
Planning Around Delays
Riders traveling through the Transbay Tube after 10 p.m. on the affected Saturdays should add at least 30 minutes to their expected travel time, transit officials said. Those with time-sensitive plans might want to consider leaving earlier or using alternative transportation options. Moovit provides real-time updates for BART routes and can help riders plan trips that account for the maintenance delays and adjusted schedules during the single-tracking periods.
