A truck has rolled at Karuah, before bursting into flames.
The semi-trailer, which was carrying paper, lost control on the Pacific Highway at around 1:30am between Tarean Road and the Karuah River.
The highway was closed in both directions at one stage.
Currently all northbound lanes are closed, with diversions in place.
The clean up operation is likely to take until midday.
The driver's been taken to John Hunter Hospital in a stable condition, nursing head injuries.