SAN FRANCISCO - JULY 05:  Commuters walk off of a Bay Area Rapid Transit (BART) train July 5, 2005 in San Francisco, California. With a strike deadline looming at the end of the July 5, BART management and union representatives are trying to hammer out a contract that would keep BART trains running and avoid potential gridlock on the roadways, as potentially over 300,000 regular BART commuters could take to the highways if the system shuts down.  (Photo by Justin Sullivan/Getty Images)