SAN FRANCISCO — BART riders heading home late Saturday, Sept. 19, should plan for a much thinner system than they may have used earlier in the day.
Starting at 10 p.m., crews will perform lighting work inside the Transbay Tube and reduce the tube from two tracks to one. BART says trains will run every 30 minutes systemwide, with only the Blue, Yellow and Orange lines operating for the rest of the night.
Which BART lines run after 10 p.m.?
After the work begins, the Blue, Yellow and Orange lines will operate. The Red and Green lines will not run.
For San Francisco riders, the practical point is not to assume the route or frequency used on the way into the city will still be available for the trip home.
How often will BART trains run?
BART says the special service pattern is every 30 minutes systemwide. A missed train could therefore add substantially more waiting than on a normal Saturday night, even before any transfer is considered.
What changes for SFO and Millbrae?
BART says a Yellow Line shuttle between SFO and Millbrae will operate during the affected service pattern. Riders traveling beyond SFO should expect a transfer rather than normal through service.
BART says its Trip Planner will reflect the special schedule. Riders with a flight or other fixed arrival time should check the return trip before leaving home rather than waiting until they reach a station late Saturday.
Why the timing matters in San Francisco
The disruption begins at 10 p.m. on a Saturday with several large public events across San Francisco. The Greek Food Festival runs until 10 p.m. that night, while the city also has multiple Sept. 19 festivals and evening programs.
The clearest late-evening overlap is Observe the Moon Night at the Presidio, which is scheduled into the evening. Anyone planning to use BART after an event should account for the 30-minute service pattern and missing Red and Green lines.
Is this the same as the Sept. 12–13 Green Line shutdown?
No. The Sept. 19 work is a separate Transbay Tube single-tracking project beginning at 10 p.m. This weekend’s Sept. 12–13 Green Line shutdown uses a different work zone and replacement-bus plan.
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