South Yorkshire Mayoral Combined Authority (Symca) Is The Owner Of The South Yorkshire Supertram System. The System Opened Between 1994 And 1995 With A Fleet Of 25 Siemens Vehicles Serving Three Routes Within The City Of Sheffield. In 2018 The System Was Extended To The Neighbouring Town Of Rotherham Using Innovative Tram-Train Technology Where Vehicles Cross Between The Light And Heavy Rail Network. To Facilitate This Extension, Seven New Vehicles Were Purchased From Stadler. The System Now Comprises Of Four Routes And 32 Vehicles. Following A Tram Derailment On The Transport For London Croydon Tram System In 2016, The Office Of Road And Rail (Orr) Uk Requires All Trams To Be Fitted With A System Which Will “...Prevent Serious Accidents Due To Excessive Speed At Higher Risk Locations”. The Purchaser Is Seeking The Supply And Installation Of An Overspeed Protection System For Their 25 Siemens Vehicles And The 7 Stadler Vehicles.