There has been a serious accident on the Princes Highway south of Hawken Road.

A southbound Toyota Hilux has crossed to the wrong side of the road and collided with the trailer of a semi trailer.

The Hilux rolled, and its driver was trapped for a short period of time.

Ambulance paramedics released him and he managed to crawl from the vehicle.

The driver suffered a broken femur and head injuries. He has been taken to Shoalhaven Hospital from where will be airlifted to a Sydney hospital.

The highway is still blocked in both directions. Southbound traffic is being diverted via Hawken Road and northbound traffic onto Island Point Road.