A-15 (Quebec)

A-15 (Quebec). It is a major north–south Quebec Autoroute system, extending from the international frontier at Saint-Bernard-de-Lacolle to its junction with Autoroute 50 in Mirabel. The highway serves as a critical transportation corridor, connecting Montreal to the Laurentides and Montérégie regions, and forms a key part of the Interstate 87 link between New York City and Montreal. Its route incorporates significant urban segments, including the submerged Autoroute Décarie through Montreal and the elevated Turcot Interchange.

Route description

The southern terminus is at the U.S. border crossing in Saint-Bernard-de-Lacolle, where it continues as Interstate 87 toward New York City. It proceeds north through the agricultural plains of Montérégie, passing near Saint-Jean-sur-Richelieu. The autoroute then enters the Greater Montreal area, becoming a congested urban freeway. Through the Island of Montreal, it follows the Autoroute Décarie trench, a major depression through the City's core, intersecting with Autoroute 20 and Autoroute 40 at the complex Turcot Interchange. After crossing the Rivière des Prairies into Laval, it continues north, serving Saint-Jérôme and the Laurentides as the Autoroute des Laurentides, before ending at Autoroute 50 in Mirabel, near Montreal–Mirabel International Airport.

History

Planning for the route began in the 1950s as part of Quebec's nascent autoroute network. The first section, opening in 1959, was a segment in Laval. The critical and controversial Autoroute Décarie section through Montreal was constructed between 1964 and 1967, requiring significant demolition and creating a lasting divide in neighborhoods like Notre-Dame-de-Grâce. The southern extension toward the United States was completed in stages, with the final link to the Saint-Bernard-de-Lacolle border crossing finished in 1974. Major reconstruction projects have since occurred, most notably the complete rebuild of the Turcot Interchange, a project managed by the Ministry of Transport (Quebec) that lasted from 2015 to 2023. The northernmost segment, extending past Saint-Jérôme to Mirabel, was completed to improve access to the Laurentides and the underutilized Montreal–Mirabel International Airport.

Major intersections

From south to north, the autoroute intersects with several other major transportation routes. At the border, it connects with Interstate 87. Key junctions in Montérégie include Route 202 and Route 219. Upon entering Montreal, it meets Autoroute 30 (bypass), Autoroute 10 for the Eastern Townships, and Autoroute 720 (Ville-Marie Expressway). The core Turcot Interchange provides connections to Autoroute 20 (for Toronto and Quebec City) and Autoroute 40 (Trans-Canada Highway). In Laval, it intersects Autoroute 440 and Autoroute 19. Further north, it junctions with Route 117, the primary route to the Laurentides and Abitibi-Témiscamingue, before terminating at Autoroute 50 near Mirabel.

Exit list

The exit numbering sequence runs from south to north, beginning at the border. Notable exits include Exit 6 for Saint-Jean-sur-Richelieu via Route 219, and Exit 22 for Autoroute 30. The complex series of exits through the Autoroute Décarie segment includes Exit 58 for Queen Elizabeth/Downtown Montreal, and Exit 64 for the Turcot Interchange and Autoroute 20. In Laval, Exit 78 serves Autoroute 440. North of Montreal, Exit 51 provides access to Saint-Jérôme and Route 117. The final exit is number 60, the junction with Autoroute 50 in Mirabel. The entire route is patrolled by the Sûreté du Québec and monitored by the Ministry of Transport (Quebec) for traffic conditions. Category:Quebec autoroutes Category:Transport in Montreal Category:Transport in Montérégie Category:Transport in Laurentides