San Francisco could soon be
the first US city to adopt a London-style congestion charge on cars in central areas. Not sure which areas they mean (I suspect the central grid north of Market St., with its numerous Muni and BART lines, is a likely candidate), but it makes sense (SF proper is compact and easily navigable by foot or public transport, is on a peninsula linked with neighbouring areas only by bridges and tunnels, and has a strong green/progressive culture which could counterbalance the stereotypical American idea of car-as-extension-to-self). Of course, the congestion charge is still on the drawing board, and faces opposition.