"In driving conditions such as this morning's it is imperative motorists maintain a high degree of situational awareness and make the appropriate decisions that match the conditions and environment," he said.
"This latest death brings the Waikato road toll to four fatalities from four crashes and the saddest thing about each of these deaths is that each was an avoidable tragedy."
Meanwhile, one person is dead after a crash in Christchurch early this morning.
Police were called to the scene of the single-car crash on Dyers Rd shortly after midnight.
A police spokesman said one person was killed.
Further information was not available.