In the 1930's, you could go almost anywhere in Philadelphia by trolley for 7-1/2 cents. We kids would sing "you can't get to heaven in a trolley car 'cause the PTC don't go that far." But they did make their way to San Francisco. Selma and I rode an old Philadelphia trolley with the PTC logo still visible when we visited San Francisco.
This opened up a lot of questions for me. When did they get there? How? why doesn't Tony Bennett sing about them?