Saint John says the Reversing Falls Bridge will be closed for 12 hours in order to protect maintenance crews working nearby.
The bridge will be closed to traffic for a 12-hour period starting at 6 p.m., on Thursday until Friday at 6 a.m.
The sidewalk on the bridge will remain open to pedestrians during that time.
The Reversing Falls Bridge will reopen to one lane of traffic after 6 a.m., until Monday morning.
Temporary traffic lights will be deployed in order to allow for alternating east and west-bound traffic said the City of Saint John.
Saint John is advising commuters to plan their travel and take alternative routes when possible.