The collision happened in the eastbound lanes of the highway around 11:15 p.m. at Dorchester Road when a passenger vehicle crashed into the back of a commercial vehicle, causing the passenger vehicle to leave the roadway and roll, police said.
The driver of the vehicle fled on foot before officers arrived, and a K9 unit was dispatched to the scene, however the lone occupant was not located.
No serious injuries were reported, and police say the driver of the commercial vehicle was taken to hospital as a precaution.
The collision slowed eastbound traffic for a period due to a blocked lane. All lanes were open as of 1:20 p.m.
Anyone with information is asked to contact OPP or Crime Stoppers.