The Princes Highway is closed to southbound motorists near Tomerong, south of Nowra, due to a five vehicle accident.
Emergency services crews are working to free people trapped in vehicles at the accident site at Blackbutt Range Road.
Southbound motorists are being diverted onto Jervis Bay Road, Pine Forest Road and Hawken Road to get back onto the highway.
Traffic in the area is very heavy so motorists are advised to delay their trip or allow plenty of extra travel time.
For the latest traffic information, visit www.livetraffic.com or call 132 701.
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