The Samuel‑De Champlain Bridge was shut down completely for the weekend at the end of the week of June 18, 2026, forcing all motorists to use alternate crossings. The closure applied to every lane of the structure, halting all vehicle traffic across the span that connects Montreal to the South Shore over the St. Lawrence River.
The bridge serves as one of the main arteries for commuters and commercial traffic moving between the island of Montreal and the municipalities south of the river. With the bridge unavailable, drivers were instructed to follow posted detour signs and use other routes to reach their destinations. While the exact alternate pathways were not detailed in the announcement, the redirection was intended to keep traffic flowing despite the loss of the primary crossing.
The timing of the shutdown coincided with the weekend, a period when many residents travel for leisure, family visits, or work‑related trips. By concentrating the interruption over Saturday and Sunday, officials aimed to limit disruption to the weekday rush hour that typically sees the highest volume of vehicles on the bridge. Motorists were advised to allow extra travel time and to stay informed of any updates posted along the usual approach roads.
The Samuel‑De Champlain Bridge, a critical link over the St. Lawrence, carries thousands of vehicles daily. Its temporary closure underscores the importance of having multiple crossing points for the region’s transportation network. Drivers who normally rely on the bridge will need to adjust their routes until the structure reopens after the weekend.
The bridge is expected to resume normal operations after the weekend closure, restoring the direct connection between Montreal and the South Shore and easing the temporary traffic diversions that have been in place for the past two days.