Traffic near the Puhoi tunnel on State Highway 1 is back to normal after north-bound motorists faced delays this morning.
New Zealand Transport Agency said the queues disappeared just before midday.
Motorist Samantha Lochery was heading south about 11am and was watching the traffic crawling north. She labelled it "traffic insanity" and said it was heavy between Warkworth and Puhoi tunnel. "There was no reason for it and it started getting heavier and heavier and heavier to the point it was actually stopped."
Meanwhile Wellington motorists are being warned there could be delays as people head to the Shiny Side Up Bike Fest from 10am-4pm at Southward Car Museum in Paraparaumu today.
There are also strong wind warnings in place on the Rimutaka Hills with the NZTA warning people travelling in a high-sided vehicle or motorcycle to take extra care.