The 22-year-old male driver of the car was arrested, then allowed to go to Whangarei Hospital for treatment. He will appear in Whangarei District Court this week on charges relating to the crash.
The rising road toll is exasperating police and other emergency services who have to pick up the pieces.
"How do you get through to people? It's a serious business driving. If you are alcohol or drug impaired, are speeding and aren't wearing a seatbelt the likelihood of dying is high if you crash," Mr Ewers said.
"These people are not going home. Over the next few days it's going to be a terrible time for their families. The public have to come onboard and obey some simple rules."
At the same time last year there were eight fatalities in Northland.
"It's frightening and ridiculous," Mr Ewers said.
Police are yet to name two German tourists killed in a crash at Kaeo on Saturday. Officers are working with the German Consulate to make contact with family of the 23-year-old man and 24-year-old woman.
The duo were in a people-mover that collided with a truck a few kilometres north of Kaeo. The truck driver, a man from the Kaeo area, was trapped and initially in a critical condition with significant leg injuries.
He was airlifted to Auckland Hospital by the Northland Rescue Helicopter, which landed in a nearby paddock.
Sergeant Haydn Korach, of Mid North police, said it appeared the people-mover had been heading south when it crossed the centre line. The driver of the truck tried to avoid a collision.