Updated

San Francisco Bay area commuters are enduring another tough morning commute because of a transit strike.

Bay Area Rapid Transit train workers stayed off the job for a second day on Tuesday, forcing hundreds of thousands of commuters to find alternate routes to work.

Traffic heading to San Francisco on the San Francisco-Oakland Bay Bridge around 6:30 a.m. was jammed leading to the bridge's toll plaza. Lines for ferries and buses appeared even longer than on Monday.

BART is running charter buses from some stations. It has doubled the number of buses serving West Oakland to 36.

Two of the largest unions representing Bay Area Rapid Transit workers went on strike after their contract expired Sunday night. No new talks have been scheduled.