Blue Line (BART)
| Company type | Rapid transit route |
|---|---|
| Industry | Public transportation |
| Founded | May 10, 1997 |
| Headquarters | San Francisco , United States |
Area served | San Francisco Bay Area |
| Products | Rapid transit service |
The Blue Line is a Bay Area Rapid Transit (BART) route operating within the San Francisco Bay Area, connecting Dublin/Pleasanton station and Daly City station. It stops at 18 stations spanning the cities of Dublin, Pleasanton, Castro Valley, San Leandro, Oakland, San Francisco, and Daly City.
Although it shares much of its track with other BART lines, the Blue Line’s eastern portion is distinctive as it runs along the median of Interstate 580. This segment features three stations exclusive to the Blue Line: Castro Valley, West Dublin/Pleasanton, and Dublin/Pleasanton.
History
Among BART’s five principal rapid transit lines, the Blue Line was introduced last. Service commenced with the extension to Dublin/Pleasanton on May 10, 1997. Later, an infill station was inaugurated on February 19, 2011, improving transit accessibility within the Tri-Valley region.
SFO/Millbrae extension service
The Blue Line was extended to include SFO when the SFO/Millbrae extension launched on June 22, 2003. However, on February 9, 2004, BART cut back Blue Line service to , redirecting the Yellow Line to serve SFO instead. Since San Mateo County is not part of the BART District, its BART operations were subsidized by SamTrans. Due to ridership falling short of projections and resulting losses for SamTrans, from September 12, 2005, BART operated only this line south of Daly City.
In February 2007, SamTrans handed over operational and financial responsibility for the SFO/Millbrae extension to BART in exchange for additional fixed funding from SamTrans and other sources. Subsequently, BART expanded service south of Daly City, with the line now terminating at .
| Date | Service description |
|---|---|
| June 22, 2003 | Daly City to SFO |
| February 9, 2004 | no service |
| September 12, 2005 | Daly City to SFO/Millbrae |
| January 1, 2008 | Daly City to Millbrae (evenings and weekends) |
| September 14, 2009 | no service |
2019–2022 adjustments
On February 11, 2019, Sunday Blue Line trains operated solely between MacArthur and Dublin/Pleasanton stations due to single-tracking work in the Market Street subway for electrical upgrades; during this period only the Yellow Line ran through the Transbay Tube providing San Francisco access.
Sunday services extending to San Francisco and Daly City were reinstated on February 16, 2020. Between February 16 and September 13 of that year—and again from March 22 to August 1, 2021—trains ended at Montgomery station amid ongoing single-tracking projects. From September 14, 2020 until March 21, 2021 and resuming August 2, 2021 onward, trains terminated at during single-tracking intervals.
Stations
| Station | Municipality | County | Opening date | Connecting BART lines |
|---|---|---|---|---|
| Template:Bart | Dublin / Pleasanton | Alameda | May 10, 1997 | |
| Template:Bart | February 19, 2011 | |||
| Template:Bart | Castro Valley | May 10, 1997 | ||
| Template:Bart | San Leandro | September 11, 1972 | Template:Ric Template:Ric | |
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| Template:Bart | Oakland | Template:Ric Template:Ric Template:Ric | ||
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| Template:Bart | September 16, 1974 | Template:Ric Template:Ric Template:Ric | ||
| Template:Bart | San Francisco | May 27, 1976 | ||
| Template:Bart | November 5, 1973 | |||
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| Template:Bart | Daly City, California | San Mateo County, California | ||