Muni is cutting service for its F-Market & Wharves historic streetcar line because it has too few operators to run them.

Along with San Francisco's iconic cable cars, the streetcars — some of which date back to the early 1900s — are popular with tourists. The F-Market & Wharves line carries some 19,700 people each day on its Market Street/Embarcadero route between Castro and Fisherman's Wharf.