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 remaining closed until the morning of July 13, 2026. The shutdown affects the primary east‑west artery that runs through Montreal, removing a key segment of the route for three full days.
Motorists traveling east on Highway 40 are being advised to seek alternate paths while the work proceeds. Drivers can divert to Highway 15, use local streets that intersect the Côte‑de‑Liesse interchange, or shift to the parallel Autoroute 20 corridor where feasible. The detour may add several minutes to typical travel times, especially during peak periods, as traffic redistributes across surrounding roadways.
The closure is part of scheduled maintenance that cannot be completed during off‑peak hours without disrupting the flow of vehicles. Officials have indicated that the work will be carried out overnight and during the early morning to minimize impact on commuters, but the three‑day window inevitably creates congestion on adjacent routes. Residents and commuters in the Côte‑de‑Liesse area should anticipate higher volumes on local streets and prepare for possible delays.
Highway 40 serves as one of Montreal’s most heavily used thoroughfares, linking the western suburbs with downtown and the eastern parts of the city. Past interruptions on this corridor have routinely led to bottlenecks and longer travel times, prompting drivers to plan ahead. Travelers are encouraged to monitor traffic updates through local news outlets or navigation apps for real‑time information on congestion and recommended alternate routes until the highway reopens on July 13.
The closure will end in the early morning of July 13, when eastbound lanes are expected to reopen for normal traffic flow, restoring the full capacity of the corridor.