At around 8:30am this morning, word went out that all northbound Caltrain service was being turned back at Bayshore station. The cause of this was unexpected time overrun on a railroad bridge replacement project in San Francisco Friday night that was due to end early Saturday morning, before the first northbound trains reached San Francisco.
As of 1pm, Caltrain is running shuttle buses from the 4th & King station to the Powell Street BART station. Caltrain is also advising passengers to transfer to BART at the Millbrae station and take any East Bay-bound train to San Francisco.
No ETA yet on when full Caltrain service to and from San Francisco will resume.