Corgi 1:50 PCC Street Car: Capital Transit Ltd, Maryland

Streetcars or trolley(car)s (North American English for the European word tram) were once the chief mode of public transit in hundreds of North American cities and towns. Most of the original urban streetcar systems were either dismantled in the mid-20th century or converted to other modes of operation, such as light rail. Today, only Toronto still operates a streetcar network essentially unchanged in layout and mode of operation.

Older surviving lines and systems in Boston, Cleveland, Mexico City, Newark, Philadelphia, Pittsburgh, and San Francisco were often infrastructure-heavy systems with tunnels, dedicated right-of-way, and long travel distances, or have largely rebuilt their streetcar systems as light rail systems. About 22 North American cities, starting with Edmonton, Calgary and San Diego, have installed new light rail systems, some of which run along historic streetcar corridors. A few recent cases feature mixed-traffic street-running operation like a streetcar. Portland, Oregon, Seattle, and Salt Lake City have built both modern light rail and modern streetcar systems, while Tucson and Atlanta have built new modern streetcar lines. A few other cities and towns have restored a small number of lines to run heritage streetcars either for public transit or for tourists; many are inspired by New Orleans' St. Charles Streetcar Line, generally viewed as the world's oldest continuously operating streetcar line.