List of AC Transit Routes - Transbay Service

Transbay Service

These routes cross San Francisco Bay and connect the East Bay with San Francisco, San Mateo, and Santa Clara Counties. All routes except Route 800 are lettered. (Route 800 is part of the All Nighter network and is listed in its respective section.) Most Transbay routes operate weekdays only during commute periods; two routes operate throughout the day on weekdays only and three routes operate daily. Most commute-only routes operate westbound from the East Bay in the morning and eastbound to the East Bay in the afternoon, but some service is provided in the reverse commute direction.