A section of State Highway 2 may be blocked for hours after a truck carrying alcohol tipped over near Napier.
Emergency services were called to the crash site about 20km north of Napier at 8am this morning.
A large truck and its trailer had rolled off the road and into a nearby ditch, a police spokesman said.
He said a crane was in place to remove it, but it was likely to take until the late afternoon before the road could be clear.
Diversions are in place.
No one is believed to have been injured.