On Friday evening a collision on Highway 50 in Gatineau, Quebec sent four people to hospital.
One of the people transported to hospital was in critical condition, their condition has since been upgraded to stable.
The other three patients are also in stable condition.
Sûreté du Québec says that a vehicle that was travelling eastward veered to the opposite side of the road, crossed the centre median and collided with a westbound vehicle.
An investigation is underway.