Muni didn’t build the first trolley coach line in San Francisco. That honor went to competitor Market Street Railway (our namesake), which converted its 33-line streetcar over Twin Peaks in 1935 to use trolley coaches (Brills, of which none survives). But Muni was aware of the advantages of trolley coaches, especially their hill climbing ability and their need for only a single driver, instead of a crew of two, as streetcars retired.
