Minor work: 15 — In Sainte-Thérèse, between A-640 and rue Saint-Charles

Highway 15 northbound will face major lane closures in Sainte-Thérèse this weekend, with two of four lanes shut down between Autoroute 640 and rue Saint-Charles for road reconfiguration work. The closures run from March 1st through March 2nd, 2026, and are classified as "major severity" by Quebec 511. The timing couldn't be more strategic — or more frustrating, depending on your weekend plans. This stretch of Highway 15 serves as a crucial artery for West Island residents heading north to the Laurentians, whether for ski weekends at Saint-Sauveur or cottage runs to Tremblant. The road reconfiguration work, while necessary for long-term traffic flow improvements, will create a significant bottleneck during prime weekend travel hours. For Pointe-Claire and West Island commuters, this closure matters even if you're not personally heading to Sainte-Thérèse. Weekend traffic patterns often see Highway 15 as the preferred route for those avoiding the perpetual construction zones on other major arteries. When 15 backs up, the ripple effect typically pushes more vehicles onto Highway 13 and the 40, potentially creating congestion closer to home. The "road reconfiguration" designation suggests this isn't just routine maintenance but part of a larger infrastructure improvement project. These types of weekend closures have become Quebec's preferred method for major highway work — concentrate the pain into a short, intense period rather than dragging out months of single-lane restrictions during weekday commutes. Smart West Islanders planning any northbound adventures this weekend should factor in significant delays or consider alternative routes through Highway 13 to the 640 east, though that detour adds considerable time and distance. Those heading to popular Laurentian destinations might want to leave earlier than usual or postpone non-essential trips. The closure also serves as a reminder of how interconnected the region's highway network really is. What happens in Sainte-Thérèse doesn't stay in Sainte-Thérèse when it comes to traffic flow, as reported by Quebec 511. Weekend warriors take note: this is one of those times when checking traffic conditions before you leave the driveway isn't just smart — it's essential. Because nothing says "romantic cottage weekend" quite like sitting in bumper-to-bumper traffic, wondering why you didn't just book that 5 à 7 at Brutopia instead.