The Pittsburg/Bay Point – SFO/Millbrae line of the Bay Area Rapid Transit system in the San Francisco Bay Area consists of 26 metro stations from Pittsburg/Bay Point to San Francisco International Airport and Millbrae. It passes through Concord, Pleasant Hill, Walnut Creek, Lafayette, Orinda, Oakland, San Francisco, Daly City, Colma, South San Francisco, and San Bruno.
When BART opened the extension to the San Francisco International Airport on June 22, 2003, this line bypassed the airport and went straight to Millbrae; only the Dublin/Pleasanton Line served the airport's station. To attract more riders, BART cut the Dublin/Pleasanton Line back to Daly City on February 9, 2004, in favor of the Pittsburg/Bay Point Line, which carried more passengers. However, BART, at the urging of SamTrans (which pays the operating expenses for BART's SFO extension) announced on August 11, 2005, that it was scaling back service on this line; effective September 12, 2005, Pittsburg/Bay Point trains once again terminated at Daly City Station.[1].
On September 14, 2009, the Pittsburg/Bay Point Line became reidentified on maps as the Pittsburg/Bay Point – SFO/Millbrae Line, as service to/from the stations between Daly City and SFO was reinstated during all of BART's operating hours, with additional service to Millbrae station on weekdays after 7pm and all day on weekends and holidays. At other times the Richmond - Daly City/Millbrae line serves the Millbrae station.
BART lines are usually not referred to by the color that identifies them on official system maps, so this line is rarely called the Yellow Line and the term has only recently come into use by BART officials.[2] It is commonly called the Pittsburg/Bay Point Line, though a few people may still call it the Concord Line, after its original termination point in Contra Costa County.
This line generally operates the longest trains in the system, with ten car trains common throughout the day and eight or nine car trains at night and on weekends. In addition, peak hour service is operated on the line to Pleasant Hill and Concord, supplementing the normal BART headway of 15 minutes on weekdays and 20 minutes on nights and weekends.
BART is planning to extend service in this direction by building an eBART (East Contra Costa County BART Extension) train service all the way to Brentwood (and beyond) in the future. The first phase will be an extension to Hillcrest Avenue in Antioch with an Railroad Avenue station in Pittsburg midway between the terminal and a reconfigured cross platform alignment at the existing Pittsburg/Bay Point station known as eBART. This Diesel Multiple Unit system is under construction and will open in 2015.
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