Yesterday, Muni Metro riders got booted from the Market Street subway and funneled onto shuttle buses after SFMTA declared the underground line out of service and activated a bus bridge. The agency said BART is providing mutual aid and directed riders to look for BART agents at downtown stations for help. Travelers were warned to brace for delays on Market Street and to follow posted signs while crews work to restore subway service.
SFMTA's update
In a late-night post on X, SFMTA told riders, "we have a bus bridge for Muni Metro Market Street" and confirmed that BART is providing mutual aid, advising passengers to see a BART agent for assistance. The short alert pointed downtown commuters to staffed stations and shuttle boarding areas while crews worked to pin down the cause of the shutdown.
UPDATE: We have a bus bridge for Muni Metro Market Street #Subwaysvc. BART is providing mutual aid. See a BART agent for assistance.
— SFMTA (@SFMTA_Muni) July 20, 2026
Why BART is helping
BART has a history of stepping in during major transit disruptions, coordinating shuttle service and ramping up staffing at downtown stations to keep riders moving when rail lines stall out. Past notices from BART show the agency has partnered with other operators to run bus bridges during both Transbay service disruptions and subway interruptions.
How the bus bridge works and tips for riders
Guidance from earlier subway closures indicates that shuttle buses usually pick up at Market Street boarding islands and travel between Embarcadero and specific transfer points, with staff and signs to help people find the right bus. Information from SFMTA also lays out accessible boarding spots and transfer maps for riders with mobility needs.
Riders should plan for longer trips and packed shuttles while the bridge is running. Building in extra travel time, checking surface transit routes or BART as backups, and keeping an eye on official agency updates will be key until normal subway service returns.
