Significant traffic snarls are forecast for Greater Montreal from September 5 to September 7, 2026, covering the Labour Day weekend. The La Fontaine tunnel, the Victoria Bridge and both Highway 20 and Highway 25 are expected to experience notable congestion, according to the latest traffic projections.
The La Fontaine tunnel, a critical underground passage for commuters traveling across the city, is identified as one of the primary bottlenecks. Drivers using this route should anticipate slower travel times and possible delays throughout the three‑day period.
Similarly, the Victoria Bridge, which serves as a major crossing over the Saint Lawrence River, is slated to see heightened traffic volumes. The bridge’s importance for both local and regional traffic makes it a focal point for congestion during the holiday weekend.
Highway 20 and Highway 25, two of the province’s busiest arterial roads, are also included in the forecast. These highways connect numerous suburbs and outlying communities to the core of Montreal, and the expected surge in weekend travel is likely to strain their capacity. Motorists planning trips on any of these corridors are advised to allow extra time for their journeys and consider alternative routes where possible.
Overall, the combined effect of the Labour Day weekend and the identified high‑traffic corridors suggests that commuters across the Greater Montreal area should prepare for extended travel periods on September 5, 6 and 7. The forecast underscores the need for careful trip planning during this peak travel window.