The traffic was difficult in the early afternoon Tuesday in a northern direction on the bridge, Samuel De Champlain following an accident.
According to the ministry of Transport of Quebec (MTQ), a collision would have occurred between several vehicles.
The way of the left and center are blocked to allow emergency services to intervene.
Firefighters were called on the spot, according to the MTQ.
The congestion starts from the Taschereau boulevard, and the area is to be avoided.