Extension Planning

Expansion & Capacity Enhancement 

BART has developed a System Expansion Policy that states goals and strategies for expanding the system including criteria for evaluating expansion opportunities. 

The Planning Department at BART assesses strategic opportunities for system expansion by conducting corridor studies for future BART services, assessing alternative methods for expanding transit services in the region, completing assessments of environmental impacts of proposed projects, and analyzing opportunities for new stations within the existing system (infill stations).


New Transbay Rail Crossing program

The Northern California megaregion, consisting of the 21 counties between Monterey, San Francisco, Sacramento and the northern San Joaquin Valley, is the 16th largest economy in the world.  A key sector which connects the megaregion together is the transbay corridor which connects Oakland and San Francisco via the Bay Bridge, BART, and ferries. On November 2018, BART and Capitol Corridor staff presented to the BART Board of Directors and the Capitol Corridor Joint Powers Authority an overview of the New Transbay Rail Crossing program, envisioning it as a new San Francisco Bay crossing served by BART and/or conventional rail at a central bay location.

The staff presentation outlined a proposed framework of contracts for project advancement from initial thinking to revenue service.  If the feasibility analysis points to a new rail crossing as an important component of the megaregion’s future transportation system, the New Transbay Rail Crossing program would evaluate a range of alternatives, advance the most promising ones for environmental review and related conceptual design, identify a preferred alternative for final design, embark on construction and construction management, and complete construction of the Project. 

BART and Capitol Corridor are committed to advancing regionwide support and funding for the New Transbay Rail Crossing program. Both agencies are intent on defining a project which promotes the megaregional economy, improves the environment, and engages with all parties – advocacy groups, jurisdictions, funding agencies, transit partners, business communities and the public. 


Active Studies

BART to Silicon Valley.  The Santa Clara Valley Transportation Authority (VTA) is working to extend BART service to Silicon Valley in two phases. 


Completed Studies and Projects

I-80 Corridor - wBART (2017)  

Jack London Feasibility Study (2004) 

30th Street Infill Station Study (2003)

BART to Livermore 

East Contra Costa BART - eBART now called BART to Antioch

Warm Springs Extension