A broken down truck has closed one lane on Princes Motorway at Keiraville just past Mount Ousley Road.
The incident occurred just before 7.30am.
Emergency services and Transport NSW are at the scene and motorists are advised to exercise caution.
There are also reports of trees down in Nowra and Mittagong.
Emergency services and a utility company are being called to the site of a large tree down in Berry Street, North Nowra.