Distrito de Transporte Rápido del Área de la Bahía
The San Francisco Bay Area Rapid Transit District is a special district consisting of Alameda County, Contra Costa County, and the City and County of San Francisco. San Mateo County, which hosts six BART stations, and Santa Clara County, which hosts two, are not part of the BART District. A nine-member elected Board of Directors represents nine districts. BART has its own police force.