Two people are injured and a car is on its side following a crash near Huntly on the Waikato expressway.
The car crashed on an off ramp and police were notified about 3.25pm, a police spokeswoman said.
Part of the road is closed and the Waikato Westpac Rescue Helicopter is in attendance.
The spokeswoman said only one car was involved and there were two patients.
One patient had serious injuries, while the other had moderate injuries.