One lane still remains shut down on Highway 132 West, after a tanker truck ended up partially submerged in the St. Lawrence River when it swerved to avoid a collision.

The incident happened around 5:30 a.m. along Highway 132 near St-Lambert, south of Montreal.

Provincial police spokeswoman Sgt. Mélanie Dumaresq said the tanker driver ended up in the river after trying to avoid a motorhome and a car that had just collided and were stopped at the side of the highway.

The tanker side-swiped the two vehicles and crashed into the river.

Its driver was able to get out of the truck with the help of two people in a boat. 

The driver was taken to hospital with minor injuries.

The tanker truck was carrying an estimated 40 tonnes of dry cement, and a team of environmental experts is on site to manage the cleanup. 

Two westbound lanes of Highway 132 were closed as a result of the incident, backing up morning commuter traffic.

By the afternoon, one lane was reopen. The right-hand lane remained closed, backing up traffic for several kilometres.