The Macdonald-Cartier Freeway, Highway 401, is the longest freeway operated without tolls by a single highway authority in North America. Extending 510 miles between Windsor on the United States border and the Ontario-Quebec boundary, it serves the richest economic region in Canada. In January 1965, The Honourable John P. Robarts, Prime Minister of Ontario, named it in honour of Sir John A. Macdonald and Sir Georges-Etienne Cartier, two founding architects of the Confederation of Canada. This site lies on the last section of construction, a 15-mile stretch between Ivy Lea and Highway 2, completed on October 11, 1968.