Kiama Council expects Jamberoo Mountain Road to be out of action for a lengthy period of time after a large landslip from the heavy rain claimed a chunk of road.
Motorists are being told to use Macquarie Pass.
Council workers have installed safety barriers at the bottom and top of Jamberoo Mountain.
Access for local residents is possible up to Misty’s Lane, and down to Barren Grounds.
IMAGE CREDIT: Kiama Council