page_title: Bay Area Rapid Transit expansion
hierarchical_section_title: Bay Area Rapid Transit expansion
caption_attribution_description: English: BART system map accurate to the opening of the Milpitas and Berryessa/North San Jose stations on June 13, 2020. Sunday service is shown in an inset.
context_page_description: Throughout the history of Bay Area Rapid Transit, better known as BART, there have been plans to extend service to other areas.
  The initial 1962 BART maps approved by voters included several lines beyond the core system marked as Possible Future Extensions. Some have since been completed:
  The extension from Concord to Antioch was carried out in phases with service to North Concord / Martinez in 1995, Pittsburg / Bay Point in 1996, and the eBART spur which started service in 2018
  A line to Livermore was completed as far as Dublin/Pleasanton by 1997, with final completion of the envisioned corridor to be carried out by Valley Rail.
  Service south of Fremont is expected to reach San Jose and Santa Clara by 2030. It was extended to Warm Springs in 2017 and Berryessa in 2020.
  Extension from Daly City to the south was completed in phases as the Colma Station opened in 1996 and the line to Millbrae was completed in 2003 with a spur to San Francisco International Airport. The full Southern Pacific right of way is considered unlikely to ever see BART service upon electrification of the corridor.
context_section_description: Throughout the history of Bay Area Rapid Transit, better known as BART, there have been plans to extend service to other areas.
  The initial 1962 BART maps approved by voters included several lines beyond the core system marked as Possible Future Extensions. Some have since been completed:
  The extension from Concord to Antioch was carried out in phases with service to North Concord / Martinez in 1995, Pittsburg / Bay Point in 1996, and the eBART spur which started service in 2018
  A line to Livermore was completed as far as Dublin/Pleasanton by 1997, with final completion of the envisioned corridor to be carried out by Valley Rail.
  Service south of Fremont is expected to reach San Jose and Santa Clara (partially via the Caltrain right of way) by 2030. It was extended to Warm Springs in 2017 and Berryessa in 2020.
  Extension from Daly City to the south was completed in phases as the Colma Station opened in 1996 and the line to Millbrae was completed in 2003 with a spur to San Francisco International Airport. The full Southern Pacific (now Caltrain) right of way is considered unlikely to ever see BART service upon electrification of the corridor.
  The Marin Line via Geary was initially cancelled due to the county exiting the planning district over funding and engineering issues. There were two possible routes: (1) via Geary to Park Presidio, then across the Golden Gate Bridge via rails that would have been built into the truss supports under the roadway, then after tunneling through the Waldo Grade to Marin City, would have emerged from underground and followed the old train tracks north through the county; (2) alternatively, to tunnel from Fort Mason/Aquatic Park to downtown Sausalito and follow the right-of-way from the old train tracks. All of these engineering plans are available for public viewing at the UC Berkeley transportation library.
  An additional corridor not part of the 1962 plan completed since the agency's inception is the automated guideway transit spur line that connects BART to Oakland International Airport  which opened in 2014.
caption: As of June 2020[update], the BART map has one route marked for Future Service, the second phase of the Silicon Valley BART extension into San Jose, shown as a thick, gray dashed line.
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