The Kouchibouguac River Bridge Number 1 on Route 133 between Shediac and Cap-Pele will be closed indefinitely.
The Department of Transportation and Infrastructure says the closure is due to deterioration on the bridge that was discovered after a recent inspection.
Detour signage is in place to re-route traffic through Route 15.
Kouchibouguac River Bridge Number 1 was closed following damage from Hurricane Dorian in early September.
The hurricane also damaged a culvert on Highway 126 north of Moncton which remains closed for repairs.
DTI expects that section of road likely won’t reopen until November 30.