Eastbound traffic on Highway 40 will be halted between the Côte‑de‑Liesse interchange and Highway 15 beginning the evening of July 10, 2026 and will remain closed until the morning of July 13, 2026. The three‑day shutdown affects a key stretch of the highway that serves commuters traveling across the western part of the city.
Highway 40 is one of Montreal’s primary east‑west arteries, carrying a large volume of daily commuters, commercial vehicles and regional traffic. The section between Côte‑de‑Liesse and Highway 15 is particularly busy during rush hours, linking residential neighborhoods with business districts and providing a direct route to the island’s central core. When the roadway is unavailable, drivers typically experience longer travel times as traffic is redirected onto secondary streets and parallel routes.
Motorists are being urged to plan ahead for the weekend closure. With the eastbound lanes inaccessible, drivers may encounter congestion on alternative corridors, especially on surrounding expressways and local roads that normally handle a smaller share of the traffic load. Travelers are encouraged to allow extra time for their journeys, consider using public transit where possible, or explore detour options that avoid the closed segment entirely.
The temporary shutdown is scheduled to end early on July 13, when crews are expected to reopen the eastbound lanes and restore normal flow. Authorities have announced that the closure is part of a planned weekend operation, minimizing disruption to weekday commuters. As the highway reopens, traffic patterns should gradually return to typical levels, though a brief adjustment period may be experienced as drivers re‑acclimate to the restored route.
The closure underscores the importance of Highway 40 in Montreal’s transportation network and highlights the need for drivers to stay informed about roadwork that can affect travel plans, especially during busy weekend periods.