State Highway 2, just north of Wairoa, was blocked for three hours yesterday morning after stock truck and trailer carrying cattle overturned blocking both lanes.
Police were called just before 10am by a motorist who came across the crash about 2 kilometres north of the Waitua Rd turn-off.
The two men in the truck were trapped and had to be freed by firefighters who were also called to the scene.
They eventually got out the badly damaged cab.
The passenger is believed to have broken his arm and was flown to Hawke's Bay Hospital.