BART Loses Service Through Transbay Tube, Downtown San Francisco

Major delays expected after computer failure disrupts commute

Published on Feb. 26, 2026

Got story updates? Submit your updates here. ›

BART experienced a computer network hardware failure on Thursday morning, resulting in the loss of service through the Transbay Tube and most of downtown San Francisco on the Green and Red lines. The issue was resolved by 9:15 a.m., but BART warned of major residual delays in the aftermath.

Why it matters

The Transbay Tube is a critical piece of infrastructure connecting San Francisco to the East Bay, and any disruption to BART service through this tunnel can have significant impacts on the commutes of thousands of Bay Area residents. This incident highlights the importance of BART's computer systems and the need for reliable backup plans when technology fails.

The details

BART first announced the initial closure around 8:20 a.m., stating that they had lost service on the Green Line from the Berryessa North San Jose station to the Daly City station, as well as the Red Line from Richmond to Millbrae. BART spokesperson Michelle Robertson said the problem was due to a failure of computer network hardware, which was subsequently repaired by personnel.

  • The issue began around 8:20 a.m. on Thursday, February 26, 2026.
  • BART restored service through the Transbay Tube and downtown San Francisco by 9:15 a.m. the same day.

The players

BART

The Bay Area Rapid Transit system, a major public transportation network serving the San Francisco Bay Area.

Michelle Robertson

A spokesperson for BART who provided information about the computer network hardware failure.

Got photos? Submit your photos here. ›

What they’re saying

“BART repaired the problem by 9:15 a.m. but said major residual delays would continue.”

— BART (mercurynews.com)

What’s next

BART will likely conduct a thorough investigation into the cause of the computer network hardware failure to prevent similar disruptions in the future.

The takeaway

This incident underscores the critical importance of BART's computer systems and the need for robust backup plans to ensure reliable public transportation service, especially for a major commuter route like the Transbay Tube.