SAN FRANCISCO TRANSIT
Official Web site of the San Francisco Municipal Railway.
Several companies originally developed cable car lines and electric street railway lines, which by 1902 had consolidated into United Railroads of San Francisco. In 1921 that company became the Market Street Railway, which after 1925 was a subsidiary of Standard Gas & Electric Co. In 1912, the City began operating its own streetcar lines under the name San Francisco Municipal Railway (Muni). In 1944, Muni acquired the Market Street Railway. And in 1952, complete unification was finally achieved, when Muni acquired the independent California Street Cable Railroad Co. Muni continues to operate cable cars, streetcars, trolleybuses, and motor buses.
How the street railways and bus lines evolved into today's transit system within San Francisco.
In the San Francisco Bay Area, each county generally has its own transit system.
The history of bus transportation in the San Francisco Bay Area is complex, and is not completely available. But the 1952 "Mass Transportation's Directory" provides an interesting "snapshot", of what obscure bus companies had coexisted with the main transit providers.
Cable Car Home Page
The San Francisco Cable Car Website
Jon Bell's Rail Transit Pages/San Francisco
Market Street Railway Online
San Francisco Municipal Railway (Wikipedia)
San Francisco Municipal Railway Fleet (Wikipedia)
Information from various sources, including the books "The White Front Cars of San Francisco" by Charles A. Smallwood, "The People's Railway" by Anthony Perles, "Inside Muni : The Properties and Operations of the Municipal Railway of San Francisco" by John McKane, and the November 1972 issue of the magazine "Motor Coach Age".
Chicago Transit & Railfan Web Site