Police are responding to a crash involving multiple vehicles on the Trans Canada Highway near the Six Mile Road off ramp.
West Shore RCMP completely shut down the southbound lanes just after 11:30 a.m. on Thursday due to the incident. One southbound lane reopened shortly before 12:30 p.m.
The northbound side of the highway is also down to one lane, police said as they asked for patience while crews respond.
Photos from the scene show a large truck tipped on its side.
Highway cameras showed northbound traffic backed up for several kilometres around noon.