BART restricts Transbay Tube to one track on July 19 | The Locally Times
Maintenance crews will limit transbay transit to a single track for the entire day, forcing systemwide 30-minute headways.
BART will reduce service to a single track through the Transbay Tube for the entire day on Sunday, July 19, 2026, to accommodate critical lighting replacement work. This operational change will limit the entire BART system to 30-minute headways and force the suspension of both the Red and Green lines for the duration of the day. As the Locally Times reported on June 7, BART previously implemented similar weekend service cuts to facilitate maintenance within the tube. The July 19 closure represents the third such event in this maintenance cycle, following similar work conducted on two previous Sundays in April and June. The agency has not released a schedule for any additional closures beyond this date. ## Service Impacts On July 19, BART will operate only three lines: the Blue, Yellow, and Orange lines. Passengers who typically rely on the Red or Green lines will need to utilize the remaining three lines and plan for longer wait times, as the system-wide frequency will be reduced to one train every 30 minutes. For travelers moving through the San Francisco International Airport (SFO) area, BART will deploy a dedicated Yellow Line shuttle train to operate between SFO and Millbrae throughout the day. Passengers traveling beyond SFO will be required to transfer to reach their final destination. BART officials indicate that the agency’s trip planning software will be updated to reflect these service changes. The agency describes the project as critical infrastructure maintenance, though it has not provided a detailed breakdown of the project’s total cost or the specific number of lighting units slated for replacement. While the agency has confirmed the July 19 date, the provided records do not specify why this particular Sunday was selected or if the maintenance schedule is intended to align with regional transit demand. The advisory does not mention the provision of alternative bus bridge services to mitigate the impact of the 30-minute train headways on passengers. ## Resident Impact The reduction to a single track in the Transbay Tube effectively halves the capacity of the primary transit link between San Francisco and the East Bay for the duration of the day. For a typical commuter or weekend traveler, this change means wait times will double compared to standard Sunday service levels. Because the Red and Green lines will be completely suspended, riders who normally utilize these routes for direct access to their destinations will face increased travel times due to required transfers and the 30-minute headway constraint. BART encourages all riders to utilize the agency's online trip planner to identify alternative routes before departing on July 19. ## Key Questions **Which BART lines will be running on July 19?** Only the Blue, Yellow, and Orange lines will be in service. The Red and Green lines will not operate. **How will the maintenance affect my travel time?** Trains will run at 30-minute intervals systemwide, and passengers traveling beyond SFO will be required to transfer to a dedicated shuttle train. **Is there any bus service to replace the closed train lines?** The current BART service advisory does not mention the provision of bus bridge services to supplement the reduced train frequency.