The Scarborough RT (SRT or RT), officially Route 3 Scarborough RT, is a rapid transit line on the Toronto subway and RT system in Toronto, Ontario, Canada. The line is internally referred to as Route 3 (formerly route 603), but this number is not used by the public or shown on TTC maps and signs. Rather than the long subway passenger cars used by the Toronto Transit Commission's three other rapid-transit lines, it runs a medium-capacity rail transport system using Intermediate Capacity Transit System (ICTS) Mark I vehicles built by Urban Transportation Development Corporation (UTDC) and powered by linear induction motors...