The existing Union City station was rebuilt as an intermodal station serving BART and AC Transit.
Phase III of the intermodal station project would create a commuter rail station for Dumbarton Rail, ACE, and Capitol Corridor trains, linked to the BART station with a passenger bridge.
The commuter rail station would be adjacent to the east side of the existing BART station.

Phase I of the Intermodal Station project was completed between 2007 and 2010, focusing on bus transit connections and west-side BART station improvements.
Phase II focused on improving the east side of the BART station and preparing it for intermodal service with commuter rail.
The existing Union City station was rebuilt as an intermodal station serving BART and AC Transit. Phase III of the intermodal station project would create a commuter rail station for Dumbarton Rail, ACE, and Capitol Corridor trains, linked to the BART station with a passenger bridge. The commuter rail station would be adjacent to the east side of the existing BART station.
Phase I of the Intermodal Station project was completed between 2007 and 2010, focusing on bus transit connections and west-side BART station improvements. Phase II focused on improving the east side of the BART station and preparing it for intermodal service with commuter rail.
Dumbarton Rail Corridor