DescriptionBART (Bay Area Rapid Transit) is a modern rapid rail system (30 km underground in downtown San Francisco Oakland and Berkeley) which crosses the Bay in a 5.8 km long immersed-tube tunnel and serves surrounding cities like Berkeley, Oakland and Richmond in the counties of Alameda, Contra Costa, San Francisco and San Mateo. Its construction began in 1964 between Concord and Walnut Creek, and the lowering of the transbay tube and the excavation of the Market Street subway in downtown San Francisco followed in the late 1960's and beginning of the 1970's. Along Market Street, BART trains run on level -3, while level -2 (once planned for another BART line) is now used by Muni Metro, an urban light rail system.
The first BART cars were ordered from the California based Rohr Industries, with later series being delivered by Soferval (Alsthom) and Morrison-Knudsen. BART is totally grade-separated (no level crossings) and runs in ATO mode without any wayside signalling.
The first stretch opened for public service on 11 September 1972 between Oakland and Fremont. In 2008, the entire network has a total length of 159 km long, with 44 stations serving some 3 million people in the area:
- 26.5 km runs in subways through urban areas (8.9 km in San Francisco; 8.6 km in South San Francisco/San Bruno; 4 km in Oakland; 5 km in Berkeley);
- 5.8 km (7.4 km with approach tunnels) underneath the San Francisco Bay at a maximum depth of 41 m below sea level;
- 5.5 km is the Berkeley Hills tunnel between Rockridge and Orinda;
- 14 stations lie on the San Francisco peninsula, and 29 on the East Bay side;
- 16 stations are underground, 14 elevated and 14 at grade (all fully accessible to the disabled).
The BART system is operated with three all-day lines:
Blue Line: Dublin/Pleasanton - San Francisco - Daly City (extended to Millbrae in the evenings and weekends)
Yellow Line: Pittsburg/Bay Point - San Francisco - San Francisco International Airport
Orange Line: Richmond - Fremont
During daytime service (Mon-Sat, until approx. 19:00) two additional lines are operated:
Red Line: Richmond - San Francisco - Millbrae (Richmond - Daly City on Saturdays during daytime service)
Green Line: Fremont - San Francisco - Daly City