The road is now clear after a crash south of Rotorua.
A police spokesman said police were called to a two-car crash at the intersection of State Highway 5 and SH30 about 11.40am.
Waka Kotahi NZ Transport Agency said the northbound lane of SH5 had been blocked but was now clear.
A St John spokeswoman said one person was taken to Rotorua Hospital with moderate injuries.