Décarie Interchange

The Décarie Interchange is a multi-level highway junction connecting Autoroute 15, Autoroute 20, and Route 136 in Montreal's road network. The facility uses a turbine-like design with stacked roadways and elevated ramps that channel traffic efficiently between the north and south of the city.

The interchange was built during Montreal's infrastructure expansion in the 1960s to prepare the city for the 1967 Expo international exhibition. Construction was part of a broader transportation renewal program that readied the city for a major global event.

The structure takes its name from the Décarie family, whose member Daniel-Jérémie served as mayor of Notre-Dame-de-Grâce from 1877 to 1904. This naming reflects the area's local heritage and continues to define the identity of this major junction.

This is a heavily trafficked junction best viewed during off-peak hours if you want to observe the structure itself without distraction. The best vantage points are from the surrounding local roads, where you can see the stacked design and complex ramp system clearly.

Engineers designed the interchange with intentional height variations across different levels to optimize traffic flow while meeting noise reduction standards. This elevation system was specifically calculated to reduce noise that would otherwise reach the nearby residential neighborhoods.

Location: Quebec

Official opening: 1960

GPS coordinates: 45.50370,-73.66630

Latest update: December 13, 2025 17:01