Officers from the traffic and highway patrol crash investigation unit are at the scene of an horrific accident which occurred this morning on the Pacific Highway, Coolongolook.
At about 11.10am emergency services were called to the scene following reports that a south bound B-double truck crossed the road, hitting a median strip wire before colliding with a north bound truck.
Police from Manning Great Lakes Local Area Command, heavy vehicle inspectors from the Roads and Maritime Services and emergency personnel attended the crash site near Wilinia Road to be confronted by a scene of crumpled vehicles and debris strewn along the highway.
One of the trucks lay crushed over a road barrier on its side.
Two helicopters and multiple ambulances and fire engines attended the accident site.
The male drivers of both trucks were trapped in the cabs of their vehicles for about an hour before being removed by emergency service personnel.
They were airlifted by the Westpac and air ambulance helicopters to John Hunter, Newcastle and Westmead hospitals in a serious condition.
Four people in car towing a caravan also were understood to have been involved in the crash, but their condition was unknown.
A spokesman for the NSW Ambulance Service said the two truck drivers both had fractures and head injuries.
"There scene is quite distressing.
There is no information on the injuries or condition of the other four people [in the car].
“There are multiple units and two choppers.”
Motorists are advised to avoid the area or allow extra travel time as traffic diversions remain in place, with one south bound lane open and all north bound traffic other than B-Doubles diverted by The Bucketts Way at Twelve Mile Creek or The Lakes Way north of Bulahdelah.
Emergency services and traffic crews remain on scene and the recovery of the vehicles remains underway.
Police are urging anyone with information in relation to the crash to contact police via Crime Stoppers on 1800 333 100.