The eastbound lanes of Highway 401 in Whitby were closed for several hours on Monday evening due to a crash involving a tractor-trailer.
Traffic was forced off the highway at Lake Ridge Road as emergency crews respond to the collision at Brock Street.
Images from the scene appear to show a pickup truck wedged underneath the tractor-trailer.
The cause of the crash is unclear at this time.
The highway fully reopened around 9:30 p.m.