Autoroute 40 is scheduled to be closed for the entire weekend of July 11‑12, 2026, covering the segment that runs from the Côte‑de‑Liesse interchange to Highway 15. The shutdown will begin early Saturday morning and remain in effect through Sunday night, encompassing the full two‑day period.
The closure affects a major east‑west corridor that carries a high volume of commuter and commercial traffic across Montreal. Drivers who normally rely on this stretch will need to seek alternative routes, such as nearby surface streets or other autoroutes, to continue their journeys. The timing of the closure over a Saturday and Sunday is expected to alter typical traffic patterns, potentially leading to longer travel times on detour routes.
Transportation officials have announced the work without providing additional details on the nature of the project or the expected reopening time on Monday. While no specific guidance on traffic management has been released, motorists are advised to plan ahead, allow extra time for travel, and stay informed of any further updates from local authorities. The temporary loss of this segment underscores the importance of Autoroute 40 in Montreal’s road network and the impact that weekend closures can have on the flow of vehicles throughout the city.