401 Highway

The King's Highway 401 (also known as the Macdonald-Cartier Freeway) is a highway that extends across Southern Ontario, Canada. It is the longest 400-Series Highway in Ontario, and one of the widest and busiest highways in the world. In fact, the highway has the distinction of being North America's busiest freeway. Together with Quebec Autoroute 20, it is the road transportation backbone of the Quebec City-Windsor Corridor, along which over half of Canada's population resides. Colloquially, the road is known simply as the 401, spoken as "four-oh-one." Aerial Photo: Highway 401 Oshawa, Durham region, Ontario, Canada)