BART loses service through Transbay Tube, downtown San Francisco

"It all started about 8:20 a.m. when BART first announced the initial closure. They announced about 8:32 a.m. that they'd lost the Green Line service from the Berryessa North San Jose station to the Daly City station. A minute later they said the Red Line from Richmond to Millbrae also was down."

"BART spokesperson Michelle Robertson said the problem had to do with the failure of computer network hardware but that personnel repaired the problem."

"During the delay, San Francisco-bound riders from the East Bay were urged to use those three lines. South of San Francisco, shuttle trains were available between the San Francisco Airport and Millbrae station and those riders could then transfer to the Yellow Line."

BART experienced a significant service disruption Thursday morning starting around 8:20 a.m. due to computer network hardware failure. The outage affected the Green Line from Berryessa to Daly City and the Red Line from Richmond to Millbrae, as well as service through the Transbay Tube and downtown San Francisco. The Orange, Yellow, and Blue lines remained operational but bypassed affected areas. BART personnel repaired the problem by 9:15 a.m., though major delays persisted afterward. Commuters were directed to alternative routes, and Muni honored BART tickets in San Francisco to assist affected riders.

Read at The Mercury News