The Sheffield Supertram is a tram and tram-train network covering Sheffield and Rotherham in South Yorkshire, England. The infrastructure is owned by the South Yorkshire Passenger Transport Executive (SYPTE), with Stagecoach responsible for the operation and maintenance of rolling stock under a concession until 2024, under the brand name Stagecoach Supertram. Interest in building a modern tram system for Sheffield had mounted during the 1980s. After detailed planning by SYPTE, the Supertram proposal was approved by Act of Parliament in 1991. Construction of the network, incorporating several existing heavy rail sections as well as new track, was carried out in sections, allowing revenue services to start during 1994. Early operations, hindered by a complex ticketing system and the initially small coverage area, had disappointing ridership figures. In an effort to turn around the performance, operations were privatised to Stagecoach in 1997, at price of £1.15 million, who took over from South Yorkshire Supertram Limited. After management and operational changes, and further expansion of the system, ridership numbers rose considerably. From 2008, interest had been expressed in hybrid tram-train operations, which would be able to use sections of the mainline rail network as well as tramways. During 2012 an experimental trial was planned, as this was to be the first deployment of tram-trains anywhere in the United Kingdom. The start of tram-train operations, using a purpose-built fleet of new Class 399 Stadler Citylink electric multiple units, was repeatedly delayed, but on 25 October 2018, operations of the new tram-train line commenced. The Supertram network now consists of 50 stations across four colour-coded lines, the Blue, Purple, Yellow and Tram-Train (Black) routes, which connect with local and national bus and rail services and six park and ride sites. History Background and initial launch In common with many British cities, Sheffield used to have an extensive tram network, the Sheffield Tramway (1873-1960). This finally closed in October 1960, it then being argued that motorised buses offered superior economics. The new Supertram network arose from ambitions held by the South Yorkshire Passenger Transport Executive (SYPTE), which had been assigned the role of public transport coordination in the area. SYPTE refined an earlier and more expansive light rail proposal to include pre-existing heavy rail alignments, in order to gain the required permissions to proceed, and deposited several Bills to Parliament in 1985–1990 to gain the necessary powers. Financial approval was given by the Department of