Ontario Provincial Police are searching for a driver involved in a hit-and-run on Highway 410 earlier this month.
Police say it happened just before 5 p.m. on May 3.
Dashcam video of the incident, which was posted to social media by Sgt. Kerry Schmidt on Tuesday night, shows a driver approaching another car in the HOV lane as the two vehicles near Derry Road.
The driver then swerves into the middle lane, passes the car and then returns to the HOV lane.
But once there, the driver appears to hit the brakes, causing the other vehicle to crash. In the video, the other vehicle is seen hitting the guardrail before swerving into the other lanes and spinning around.
As this is happening, the driver of the first vehicle continues to travel along the highway, leaving the scene.
There has been no word on injuries.