The SF Municipal Railway, Muni, runs trolleys, cable cars, street cars, and buses throughout the city. The cable cars are the most notable of conveyances. Along two routes, Muni supplements the usual streetcars with older models that it has resurrected and put back into service. These two lines run primarily on Market St and along The Embarcadero. These are just two that I saw today along Market. The latter photo shows a model thats not as old as the former picture. I recall actually riding on the latter model when I was a child