The Police Serious Crash Unit and the Commercial Vehicle Safety Team were investigating.
The death follows a horror few weeks on our roads and a particularly grim Easter Weekend.
Six people died on New Zealand roads over Easter weekend, three times as many as last year.
So far this year 111 people have died on New Zealand roads.
In the 12 months to April 6, there had been 355 road deaths.
In a statement given to the Herald after the Easter Weekend, national manager for road policing Superintendent Steve Greally was urging motorists to use their common sense when on the road.
In particular he said, drivers needed to slow down and be patient.
"Don't use your phone and for god's sake don't drive drunk," he said.
"Inattention is one that catches a lot of people out too, whether it's your phone or just something on the side of the road."