Traffic to the Coromandel in the Waikato is still heavy but is flowing.
Traffic heading to the Northland Region has also eased and is now flowing freely.
However, the road two kilometres from Aokautere on the Pahiatua Track is blocked due to a serious crash.
Police and other emergency services are in attendance and motorists are asked to take an alternative route.
There is a 7km queue at Kopu Bridge near Thames and traffic on Auckland's Northern Motorway is very slow.