SAN FRANCISCO — Thousands of commuters in the San Francisco Bay Area were scrambling for alternate routes after its regional commuter rail system known as BART shut down systemwide for several hours Friday morning.
Bay Area Rapid Transit said it could not run its train control system due to a malfunction.

A BART spokesperson said on its media phone line that they could not power up the train control system, which prevented them from being able to safely operate the trains. The cause was not imm …