sentences:  As a result of this, Highway 48 and Donald Cousens Parkway (York Regional Road 48) will become the through route while Main Street will meet them at an intersection demarcating the two.The history of Donald Cousens Parkway dates back to the 1970s when Metropolitan Toronto and the Ontario Department of Highways, (now the Ministry of Transportation of Ontario or MTO) planned out the "East Metro Transportation Corridor".This corridor was originally envisioned as a six-lane expressway connecting Highway 401 with the planned but unbuilt Highway 407 to service the future towns of Cornell and Seaton using the greenspace between the two.