Jamberoo Mountain Road is closed in both directions between Illawarra Highway, Robertson and Daltons Road, Jamberoo due to a landslide.
Motorists should use the Illawarra Highway (Macquarie Pass) or Princes Highway instead.
Emergency services and council crews are on site.
Motorists are also advised to take care and allow extra travel time.
For the latest traffic information, visit www.livetraffic.com, download the Live Traffic NSW app or call 132 701.
Photo: Kiama Council