Chatham-Kent OPP say the westbound lanes of the 401 will be closed until the investigation into a serious collision this morning is concluded.
According to police, two tansport trucks collided east of Tilbury around 11:30.
As a result of the collision, one driver has been transported to hospital via air ambulance with life-threatening injuries.
All westbound lanes of Highway 401 between the Tilbury South ONRoute and Mill Street are closed.
Police are on scene with Emergency Medical Services (EMS) and firefighters.
