CBS News Bay Area has team coverage of Friday's BART shutdown. Reporter Lauren Toms got answers on the cause of the outage while Kevin Ko spoke with riders including one who missed an important test for a job.

BART said it was unable to power up the system on Friday, leading to train control problems. The last time a similar issue arose, it took several hours to recover. BART staff fanned out to stations to inform and direct riders to buses and other modes of public transit.