UPDATE 4.20pm: TRAFFIC appears to have peaked on the Pacific Highway with queues at Kempsey and Buladelah slowly reducing.
A spokeswoman from the Traffic Management Centre said it appeared traffic flows had peaked earlier this afternoon.
The spokeswoman said travel times should begin to improve now for motorists travelling up the Pacific Highway from Sydney.
"Traffic should ease ... the later it gets the better it should get," the spokeswoman said.
At 3.55pm traffic was still banked back 19km at Kempsey, 11km at Buladelah and 4km at Macksville.
UPDATE 1.10 pm: TRAFFIC has ground to a halt on the Pacific Highway with 22km queues of northbound motorists heading into Kempsey.
Motorists are advised to allow an extra 90 minutes on their journey just to get through the Kempsey bottleneck.
The news doesn't get any better with 13km queues being reported at Buladelah, and 7km queues at Hexham.
Police are advising motorists to allow at least an extra two hours on their journey to the North Coast or to detour via the New England Highway to reduce travel times.
UPDATE 11.30am: NORTHBOUND motorists are being warned to allow almost two hours extra travel time on the Pacific Hwy.
At Kempsey queues have stretched to 18km and drivers are being warned to allow up to 60 minutes extra travel time.
Further south at Bulahdelah a growing 8km queue is adding at least 40 minutes additional travel time.
At Macksville motorists are advised to allow up 20 minutes extra with a 6km queue currently hindering progress.
Additionally a previous three vehicle accident northbound on the Pacific Highway at Hastings River Drive is affecting northbound motorists near Port Macquarie.
Northbound queues are currently 6km approaching the incident. For the latest traffic information visit livetraffic.com or call 132 701.
10.45am: MOTORISTS travelling towards the NSW North Coast are being warned to expect long delays due to a heavy holiday traffic build-up this morning.
Northbound traffic is slowing to a crawl on the Pacific Highway with the latest reports from the Traffic Management Centre stating 12km queues are forming just south of Kempsey, 8km queues at Bulahdelah and 4km queues at Macksville.
Just an hour earlier at 9.45am the Traffic Management Centre reported heavy holiday traffic northbound on the Pacific Highway with motorists experiencing 9.5km queues at Kempsey, 6km queues at Bulahdelah and 1km queues at Macksville.
A Transport Management Centre spokeswoman added that eastbound traffic travelling along the New England Highway approaching the Hexham Bridge was experiencing delays with current queues of 1km.
The spokeswoman said motorists are advised to expect delays and allow for additional travel time.
For the latest traffic information visit livetraffic.com or call 132 701.