Nighttime repair work is now underway on the De Gaulle Viaduct, which spans Highway 640 in Sainte-Thérèse. The project, scheduled to last through the end of June 2025, will result in recurring traffic disruptions each week from Sunday evening to Friday morning.
According to municipal officials, work will take place nightly between 9:00 p.m. and 5:00 a.m. One of the two lanes on the viaduct will remain open at all times, ensuring partial circulation over the structure. However, Highway 640 itself will face full closure in one direction at a time, with drivers being rerouted via boulevard De Gaulle and entrance 26.
Pedestrians will still be able to cross the viaduct using the remaining open sidewalk. Cyclists, however, must dismount and walk their bikes through the construction zone. Dynamic signage will be in place throughout the site to guide and warn travelers. Officials urge the public to exercise caution while moving through the area, especially during work hours.
This rehabilitation effort is part of a broader regional infrastructure maintenance program aimed at improving the safety and longevity of aging overpasses. While the precise nature of the repairs has not been publicly detailed, such works typically include resurfacing, structural reinforcement, and drainage upgrades.
City engineers caution that the schedule is subject to change depending on weather conditions or unforeseen operational delays. Commuters are encouraged to check for updates before setting out and to plan alternate routes when possible.
For the latest information on closures and detours, residents can consult the municipal website or local traffic advisory platforms.
