State Highway 2 between Paeroa and Waihi is closed in both directions because of a crash.
A car has hit a power pole, a Waikato police spokesperson said.
The section that is shut is between Te Aroha Rd, Paeroa in the north and Dean Crescent, Wahi in the south.
The road is expected to be closed for two to three hours.
Please avoid the area. Diversions are in place.