Another train line would be a waste -- take the window seat on Caltrain and look how utterly empty it is the second you leave SF. The whole way down the peninsu

Another train line would be a waste -- take the window seat on Caltrain and look how utterly empty it is the second you leave SF. The whole way down the peninsula the train is flanked by flat, low-density construction spotted with breaks of wide open space. You don't see any real high-density housing until you get to San Jose.