The Pacific Highway could be completely blocked north of Coffs Harbour this morning for a salvage operation.

The Roads and Maritime Service says a truck carrying a wide load hit the concrete road barriers near the Big Banana just before 6:00am (ADST) this morning, Monday December 16, 2013.

The accident has blocked a lane in either direction.

Dave Wright from the Transport Management Centre said significant delays are likely in the area over the next couple of hours.

"We're getting resources on site at the moment," he said.

"This recovery is going to take in two cranes.

"We're going to wait just to see 9:00am (ADST) come and go to allow most people to get to work.

"Then we're going to actually try and do this recovery.

"Hopefully we won't have to actually close the highway but when you're doing such a major recovery moving a 79 tonne, 16 metre concrete girder for safety reasons it may have to be the case."