Significant delays and road closures are slated for several key arteries in Greater Montreal during the Labour Day weekend, which runs from September 5 to September 7, 2026. Officials have warned that the La Fontaine tunnel, the Victoria Bridge, and provincial highways 20 and 25 will be among the most affected routes, prompting motorists to expect slower travel times and possible detours.
The La Fontaine tunnel, a primary conduit for north‑south traffic, is slated for extensive work that will limit its capacity throughout the holiday period. Drivers using the tunnel should anticipate queuing and may need to seek alternative crossings. Similarly, the historic Victoria Bridge, which carries both vehicular and pedestrian traffic across the St. Lawrence River, will see sections closed or operating at reduced speed, further constraining movement between the island and the South Shore.
Highways 20 and 25, two of the region’s busiest expressways, will also experience substantial disruption. Maintenance and construction activities are planned for both routes, leading to lane reductions and intermittent closures. The combined effect of these projects is expected to ripple across the commuter network, causing congestion on feeder roads and secondary streets that normally serve as backup routes.
Motorists are advised to adjust travel plans, allow extra time for journeys, and consider public transportation options where feasible. Checking real‑time traffic updates before departing and staying informed about evolving road conditions can help reduce inconvenience. The anticipated disruptions underscore the importance of early departure and route flexibility for anyone traveling within or through Greater Montreal over the three‑day holiday weekend.