You either arrange your town so everyone can walk to the rail station, or you end up with Los Angeles. My favorite example is the Swiss city Chur. This negligibly-populated, irrelevant little town, which is 4% the size of San Francisco, has a 12-track rail station that is much better than the one that San Francisco plans to have by 2050. And, of course, the trains come constantly. In the next hour Bahnhof Chur will enjoy the arrival of 13 trains, and that's their pre-dawn service!