Bay Area Rapid Transit workers walked off the job Friday for the second time in four months.
Work rules for employees emerged as a key issue in BART contract negotiations that resulted in union leaders announcing Thursday that workers will go on strike Friday.
A team of federal mediators bowed out of the BART contract negotiations Thursday as union representatives announced that the talks have failed and workers will strike at midnight.
A marathon bargaining session between Bay Area Rapid Transit management and its two biggest labor unions that began Wednesday morning lasted all night and was continuing Thursday, BART spokeswoman Alicia Trost said.
Bay Area Rapid Transit will continue to run train service as unions and management agreed to extend labor talks Wednesday night.
California Gov. Jerry Brown appointed a board to investigate the contract dispute between Alameda-Contra Costa Transit District and one of its unions, putting off the threat of a strike this week.
Labor unions representing Bay Area Rapid Transit workers said they will tell frustrated riders in advance whether trains will be running Thursday or workers will possibly go on strike at midnight.
Federal mediator George Cohen said Tuesday night that parties have made some progress in the intense negotiations to avoid a second strike in more than three months.
Bay Area Rapid Transit will continue to run train service after unions and management agreed to extend labor talks past a midnight deadline.
Tensions escalated at the BART bargaining table Monday with the possibility of a strike on Tuesday appearing to grow stronger.