Ontario Highway 427

Ontario Highway 427

King's Highway 427, also known as Highway 427 and colloquially as the four-twenty-seven, is a 400-series highway in the Canadian province of Ontario that connects the Queen Elizabeth Way (QEW) and Gardiner Expressway with York Regional Road 7, formerly Highway 7. An arterial extension continues 800 metres (2,600 ft) north to Zenway Boulevard, known as York Regional Road 99. This arterial extension will likely be replaced by a proposed northward extension. It is Ontario's second busiest freeway by volume and third busiest in North America. Like the nearby Highway 401, a portion of it is divided into a collector-express system with twelve to fourteen continuous lanes. Notable about Highway 427 are its several multi-level interchanges; the junctions with QEW and Highway 401 were Ontario's first four-level interchanges and were constructed between 1967 and 1971, while the interchanges with Highway 409 and Highway 407 are more recent and were completed in 1992 and 1995, respectively.

Highway 427 is the main feeder to Toronto Pearson International Airport from the north and south. However, while much of the traffic comes from Highway 407, Highway 401 (eastbound), and the QEW / Gardiner Expressway makes use of the freeway for airport access, it serves the western portion of Etobicoke (Rexdale), the northeastern portion of Mississauga (Malton) and the western portion of Vaughan (Woodbridge).