Police and fire crews are on scene after a transport truck rolled into the ditch off eastbound Hwy. 401.
OPP says the truck involved lost control and rolled onto its side on the highway near Essex County Rd. 42.
The driver has been taken to hospital as a precaution. The cause of the crash is still unknown.
The eastbound 401 at County Rd 42 is now open in both directions. However the on-ramp remains closed.