シグ
In August 1973 the TTC placed an order with the OTDC for 200 new Canadian Light Rail Vehicles (CLRV). The design was purchased from the Swiss company Schweizerische Industrie Gesellschaft (SIG). SIG was contracted to build the first 10 before turning over construction to OTDC, subcontracted at Hawker Siddeley's CC&amp;F factory in Thunder Bay. The prototype run was cut to six, in order to allow four to be converted into an articulated design, the Articulated Light Rail Vehicle (ALRV). UTDC unveiled the ALRV at a June 18–19, 1982 open house at its Transit Development Centre, which over 10,000 people attended.