The night before, a person was left critically injured near Taupō after a two-vehicle crash at 11.30pm on the East Taupo Arterial route in Rotokawa.
One person was initially trapped but later then flown by helicopter to Rotorua Hospital in a critical condition.
The road was closed until about 4am.
In Christchurch four people were injured yesterday , one seriously, after two cars and a camper van crashed.
Another six people were injured and part of State Highway 56 was blocked after a four-vehicle crash at Tiakitahuna, southwest of Palmerston North.
One man in his 60s was flown to Auckland City Hospital in a critical condition after crashing his car on the Tuakau Bridge-Port Waikato Rd. His car rolled several times before coming to rest on its roof just before 3pm.
Police warned motorists to expect delays as the road was closed and diversions in place and urged people travelling today to take extra care on the roads.