Or Caltrain. The new electrified Caltrain is a massive improvement: it runs at least every half hour all day, every day. I don’t know whether it was intentional on the part of the agency, but they stumbled upon the obvious phenomenon that many people will not use a transit system that runs too infrequently and that, conversely, if you have infrequent trains with low ridership, your ridership might return if you increase frequency.