Two cars have crashed on State Highway 3, injuring four people and delaying traffic on a key route from Te Kuiti to New Plymouth.
The crash happened at 2.45pm on Saturday between the junctions with Papakauri Road and Awakau Road, a police spokeswoman said.
The Taranaki rescue helicopter flew one critically injured person to Waikato Hospital.
The Waikato rescue helicopter also took two female patients to Waikato Hospital, both with moderate injuries. One was the driver, and sole occupant, of one car and the other was a passenger in the other car.
St John ambulance said a total of four people were injured.
The highway was initially closed and then stop/go traffic management was put in place. NZTA warned of delays.