Union officials said employees have been working without a contract since July 1, as the two sides have been negotiating since April.
After the two sides returned to the bargaining table, in an effort to end a labor dispute, the union of transit operators has walked away from those negotiations.
San Francisco Muni officials and the Transportation Workers Union are in talks with a mediator about the contract dispute that prompted last week’s three-day driver sick-out.
A three-person panel appointed by Gov. Jerry Brown was holding a hearing Monday on a labor dispute between AC Transit and its workers that nearly led to a strike last week.
Negotiators for Bay Area Rapid Transit and its labor unions resumed negotiations Tuesday afternoon, just hours after marathon negotiations that ended during Tuesday morning’s commute.
The two sides have failed to hold talks since a cooling off period was ordered in early August.
Gov. Arnold Schwarzenegger and legislative leaders have canceled their scheduled budget talks, continuing a record-long impasse over enacting a state spending plan.