Local diversions are in place for light vehicles.

Heavy vehicles are being diverted at Muswellbrook and Scone in each direction on Denman Road, Golden Highway and Scone Road via Merriwa.

This diversion will add around an extra two hours to travel times.

The diversion is not suitable for extended B-Doubles which are being parked.

Emergency services, Crash Investigation and traffic crews are on scene.

Due to the nature of the crash there is no forecast of when the highway will reopen.

For the latest traffic information, visit www.livetraffic.com