Several lanes of Highway 401, between Mavis and Mississauga roads, are shut down following a collision involving a dump truck late Monday afternoon.
Ontario Provincial Police (OPP) say a truck loaded with gravel was travelling eastbound just before 5 p.m. when a mechanical failure occurred, causing the vehicle to hit the concrete guide rail and spill gravel into the westbound lanes.
Dump truck rollover. #Hwy401 between Mavis and Mississauga Rd.
EB truck loaded with gravel experience the mechanical malfunction hit the concrete guide rail spilling gravel into the westbound lanes. All westbound express lanes closed in the area, traffic can still get by in the… pic.twitter.com/q2uDmwsSNg
— OPP Highway Safety Division (@OPP_HSD) May 4, 2026
Police said the driver sustained only minor injuries.
Currently, all westbound express lanes are closed in the area. Traffic can, however, get by in the collectors, the OPP said.
The eastbound HOV lane is also off limits.
The closures are expected to last several hours as crews clean up the mess.
Police are advising drivers to expect heavy traffic in the vicinity and are reminding them to use caution while travelling through the area or consider an alternate route.
More details to come. This is a developing story.