A truck has rolled on State Highway 49 near Ohakune blocking the road.
Police said a truck carrying dairy products rolled on the highway near Rangataua Rd about 1.50pm.
The driver was not seriously injured but the road would be blocked for some time, police said.
A crane was on the way to move the truck and cleaners had been called to clear the area.
Diversions were being put in place but police thanked drivers for their patience.