State Highway 2 between Kotemaori and Putorino is now open under stop/go traffic management after a truck rolled closing the road this monring.
The truck rolled at 7.04 am blocking both lanes and police said it could take hours to be removed.
The road was re-opened to one lane at 11.15 am.
Delays are still expected as contractors continue to clear the road.
At 10.40am a tow truck arrived on site attempting to recover the vehicle.
