Eastbound traffic on Highway 40 will be closed from the evening of July 10 until the morning of July 13 between the Côte‑de‑Liesse interchange and Highway 15, officials said. The three‑day shutdown is expected to produce congestion on alternative routes as commuters seek detours.
The closure affects the eastbound carriageway of Highway 40, a primary commuter artery that links the western suburbs with downtown Montreal. Drivers traveling toward the city will encounter a complete stop in the segment that runs from the Côte‑de‑Liesse interchange, located near the borough of Saint‑Laurent, to the junction with Highway 15, a major north‑south corridor.
Motorists are advised to use other highways, such as Highway 15 southbound, Autoroute 20, or local streets, to bypass the affected stretch. Traffic management officials have indicated that the detour traffic may increase travel times by up to 30 minutes during peak periods, especially on Friday evening and over the weekend.
The work scheduled for the closure is part of routine maintenance on the highway’s pavement and drainage systems. The timing was chosen to limit impact on weekday rush hour, but the weekend window still coincides with higher leisure travel, which could amplify delays.
Commuters who rely on Highway 40 for daily trips are urged to plan ahead, check real‑time traffic updates, and allow extra time for their journeys. The closure will be lifted on the morning of July 13, restoring eastbound flow between Côte‑de‑Liesse and Highway 15.
Drivers are reminded to follow posted signs and obey any temporary speed limits during the work.