"I'm sitting at zero miles an hour - the road ahead is full of caravans and motorhomes and trailers with boats on - it's just crazy," he said.
Mr Davis, who was returning with his wife to their Mangawhai holiday base from a trip to Whangarei, said most drivers appeared to be patiently waiting in the queue.
However, some were turning back to Whangarei against northbound traffic, "which is dangerous in itself".
He had phoned an NZTA official who told him a traffic management plan had been in place which was "supposed to have worked, but it doesn't look like it has".
Ms Hori-Hoult said the work was stopped and the lane was re-opened about 2pm, however it was taking time to clear the queue because of the large number of motorists heading south.
"Motorists are travelling through the area well below the 50km/h speed restriction which means it is taking extra time to clear the queue of traffic which extends back to Whangarei."
Ms Hori-Hoult apologised for the delays and the inconvenience caused to motorists. "We hope to have traffic fully flowing again by early evening and will resume the work in off-peak hours."
Northland road policing manager Inspector Murray Hodson said a majority of holidaymakers were heading home today and he anticipated the traffic flows would be heavy.
Highway patrol staff were about to start and would be sent out on the main roads.
"A majority of traffic will be heading home. Drivers should keep their distances and take a break after two hours when fatigue sets in," Mr Hodson said.
- Additional reporting by The Northern Advocate