St John Ambulance said no one else was injured.
Another person died after their car crashed into a tree on Pyes Pa Rd in Tauranga.
Underdown said the crash happened around 10.15pm between Williams and Taumata Rds.
And another driver was dead after a car left the road and crashed into a paddock in the Clutha District, police said.
The single car crash happened about 11pm, between Switzers and Moncurs Rds. The road was reopened byabout 1am.
A fourth man died in the Waitaki District about 1.50am when his car crashed into a bridge between Herbert-Hampden and Woodburn Rds in Herbert. Police said it appeared no other vehicle was involved.
Waikato Senior Sergeant Simon Cherry said a man was in a critical condition after his motorcycle and a car crashed on Heaphy Tce, Hamilton, at 10.20pm yesterday.
Meanwhile, a rescue helicopter is headed to a central North Island highway where a driver was trapped after a truck crashed into a bank early this morning.
A police spokeswoman said the crash was on SH4 between Tohunga and Middle Rds 9km north of Raetihi.
The highway was closed near the intersection with Matapuna Rd at 6.45am.
The driver was in a moderate to serious condition, she said.
A helicopter had been called to fly the injured driver to hospital.
A heavy haulage tow truck has been called to clear the wreckage from the highway.
