The western terminus of Autoroute 40 is located at the Ontario–Quebec border, where it continues as Highway 417 towards Ottawa; the eastern terminus is in Boischatel, where it transitions into Route 138 at the end of the freeway. The portion of Autoroute 40 from the Ontario border to Autoroute 25 is part of the Trans-Canada Highway. The Metropolitan Autoroute portion in Montreal is the busiest highway in Quebec, the busiest section of the Trans-Canada Highway, as well as the second busiest highway section overall in Canada after Highway 401 in Toronto.
History
Two sections of Autoroute 40 were not part of the original plans: The original intention was to bypass Trois-Rivières to the north. In addition, a different route was originally planned around Sainte-Foy south of Jean Lesage International Airport. While the right-of-ways of both bypasses still exist and may still be developed in the future as congestion increases, there are no immediate plans to renew construction. Some discussion of eastward extensions of A-40 into the Charlevoixregion and beyond have taken place, most likely to Route 360 in Beaupré or even as far as Route 362 in La Malbaie since tourism in the region is increasing; however, that appears unlikely in the short term. A stretch of the highway in Pointe-Claire, from roughly St. John's Boulevard, near Fairview Pointe-ClaireShopping Centre, to the turnaround loop, Senneville Road was used during the 1976 Summer Olympics for the men's road team time trial cycling race. In 1997, the highway was renamed Autoroute Félix-Leclerc after the late Quebec artist and political activistFélix Leclerc. Prior to 1997, Autoroute 40 east of Montreal had four different names, the first section was named Autoroute de la Rive-Nord between Montréal and Saint-Augustin-de-Desmaures. A segment in Trois-Rivières east of Autoroute 55 that was named Autoroute de Francheville . Between Saint-Augustin and Autoroute 73 in Quebec City it was called Autoroute Charest. Finally, between the junction of Autoroute 73 and Autoroute 573 and its eastern end at Route 138 it was known as Autoroute de la Capitale, a name that is still commonly used by Quebec City residents.