Man and 12-year-old from U.S. seriously injured in crash on Hwy. 403 in Mississauga
Posted August 11, 2026 5:49 pm.
Last Updated August 12, 2026 8:34 am.
Two people, including a 12-year-old boy and a man, both U.S. residents, were seriously injured in a multi-vehicle crash in the westbound lanes of Hwy. 403 in Mississauga, Ontario Provincial Police (OPP) say.
It was reported that around 5 p.m. Tuesday just west of Mavis Road, two vehicles were involved in a crash. Both moved to the shoulder to exchange information outside their vehicles.
Shortly after, a third vehicle collided with one of the vehicles, pushing it forward into two people, a 43-year-old man and a 12-year-old child, as they were standing on the roadway.
Both U.S. residents were taken to a Hamilton hospital with serious injuries. A third person suffered minor injuries.
The driver of the third vehicle was not injured.
The highway was closed between Mavis Road and Erin Mills Parkway for several hours but reopened just before 11 p.m. on Tuesday.
