Provincial police believe impaired driving was a factor in a crash that caused slowdowns on Highway 401 during the Thursday morning commute.
Two vehicles collided in the eastbound lanes of the highway at Elgin Road (Highway 73) around 5:30 a.m.
One of the drivers of the involved vehicles took off running, Middlesex OPP said. That individual was arrested with the help of a person who was passing by at the time.
A 20-year-old has since been charged with impaired driving.
No injuries were reported.
The crash slowed the three eastbound lanes for just over an hour.