these routes were discontinued following the completion of rail line extensions starting in the late 1990s. BART Express was operated for BART under contracts to AC Transit (1974-1989) and Laidlaw (1989-1997). Since then, some services similar to the legacy BART Express routes which were not replaced by rail service have been taken over by local bus operators, including WestCAT and Tri Delta Transit.

To accommodate those with conditions and disabilities that prevent from boarding a train, BART has entered a joint venture with AC Transit