[BTinSF]

^^^You gotta start somewhere, I say. As I recall, there was discussion that although the subway presently being planned would end in Chinatown, the tunnel could go as far as Washington Sq. It seems more likely that such a route could be extended around the northern edge of the city than building such a route from scratch in the absence of the Central Sunway now being planned. I also think that it wouldn't really need to be underground in North Beach and the Marina--it could surface near Washington Square and run as a surface LRV on Columbus, Northpoint, Bay and Marina Blvd.