The Illawarra Highway is closed in both directions at Robertson due to fallen trees and wires down between Sheepwash Road and Pearsons Lane.
Light traffic is being diverted via Pearsons Lane, Wildes Meadows Road, and Sheepwash Road to re-join Illawarra Highway.
Motorists should allow extra travel time and exercise caution through the area.
Heavy vehicles can divert via the Hume Motorway, Picton Road and the M1 Princes Motorway, which will add about 30 minutes additional travel time.
For the latest traffic information, download the Live Traffic NSW app, visit www.livetraffic.com or call 132 701