The Bay Area Rapid Transit (BART) system serves San Francisco and portions of
San Mateo, Alameda and Contra Costa Counties.
It extends far beyond the
traditional urban core, with its fares increasing in general with the distance
traveled, and thus BART also bears some resemblance to a commuter rail
There are five lines operated. Four start on the San Francisco
Peninsula in either Daly City, San Francisco International Airport or Millbrae, and utilize the subway under
Market St. through downtown San Francisco and then the Transbay Tunnel
before splitting off to reach different East Bay destinations. The
fifth line stays in the East Bay.
This photo is looking south from Platform 3 at Daly City, first stop
south of the city limits of