Doncaster Corporation Tramways was an electric tramway network serving the town of Doncaster, England. It was authorised in 1899, and the first route to Bentley opened in 1902. This remained separated from the rest of the system until North Bridge was built to carry traffic over the Great Northern Railway main line to Edinburgh. Soon afterwards, deep mining of coal began in the area, and several extensions to the system were made between 1913 and 1916 to serve new communities which developed around the pit heads. The Racecourse route was unusual, in that it had balloon loops at both ends to enable almost continuous running on race days, a feature that was not common in England, and only found favour in Europe in the 1950s and 1960s.