Paul Sauer takes BART regularly for work and relies on public transportation to come into San Francisco.

"You know it needs to be reliable for everybody in the Bay Area," Sauer said. "I already have concerns with public transit in the Bay Area. I think we could be doing a lot better. The fact that one of our biggest systems is constantly failing is a big issue."

The Oakland native is concerned about service reliability, recurring shutdowns and other issues on BART. Friday's closure marks the second major systemwide shutdown in four months, following a power outage in May .

Last week, brake smoke on a train forced a temporary closure in the Transbay Tube , leading to a chaotic situation for commuters.

"Anytime anybody brings up any concerns with it, BART doesn't really seem

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