Toronto's TTC extended rapid transit service to the vicinity of YORKDALE CENTRE with the completion of the Spadina Expressway Line, which began revenue service in January 1978. It was an expressway median route, similar to those on Chicago's "L". Proposed extensions to the expressway were bitterly contested and the project was abandoned in 1971. What had been completed was renamed Allen Road in 1980.
Photo from Wikipedia / "GTD Aquitaine"
TTC's Yorkdale Station was physically connected to the mall (via the Yorkdale Place office tower) in 1986.
Photo from Wikipedia / "Eja2k"