Edmonton Radial Railway

The Edmonton Radial Railway (ERR) (also known as the Street Railway Department) was a streetcar service that operated in Edmonton, Alberta, from 1908 to 1951. It was Edmonton's first public transit service, and later evolved into Edmonton Transit Service. Beginning as a small agency with 21 kilometres (13 mi) of track and four streetcars, the ERR would eventually operate more than 70 streetcars on over 90 kilometres (56 mi) of track, reaching most areas of the city. At its peak in 1929, the ERR served more than 14.1 million passengers.

The service suffered from under-investment during the Great Depression, as the city could not afford to replace old streetcars, tracks, or other infrastructure. Starting in 1932, streetcar lines were phased out in favour of trolley and gas bus routes, and by August 1949 only one core line was left. The last day of public streetcar service was September 1, 1951. Until Edmonton's LRT service opened in 1978, all transit routes were delivered by buses or trolley buses.