San Francisco is home to the largest working collection of vintage streetcars in the world. One of the city's most recognizable and beloved attractions, the streetcar line which runs through the heart of the city serves more than 20,000 riders a day. San Francisco's Market Street Railway continues to collect vintage cars from all over the world and to lovingly restore them to service as part of this rolling museum that pays tribute to cities who have operated streetcar lines in the past and present. This delightful book showcases this historic fleet with more than 120 pages of beautiful color photos of currently restored and active streetcars. Each car is introduced with a paragraph describing its history. The book also explores the history of the streetcar as urban transit, both nationally and within San Francisco, and also tells the story of how this amazing "Museum in Motion" came to exist as one of San Francisco's most famous attractions.