A person was trapped inside the car and was found dead, police said. Another occupant of the car had been ejected from the vehicle.
Four people have been taken to hospital, two in a serious condition and two in moderate conditions.
The Serious Crash Unit attended the crash, and the motorway was reopened around 3.20am.
The car is believed to have lost control, crossed several motorway lanes and rolled.
Photographs from the scene showed a red Mazda sedan upside down on the motorway.
Meanwhile, two people died in separate crashes yesterday.
One person died after a two-vehicle crash on State Highway 1 near Waiomio, south of Kawakawa, around midnight.
A man died on Waikoha Rd in Karamu, near Waipā, after his vehicle left the road and rolled into a paddock about 7.40am.
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