Will the New Zealand Highway Police issue tickets on the spot?

Yes.

There are few high-speed cameras in New Zealand. They are all patrolled by the highway police, and fines will be issued on the spot if any illegal behavior is found.

Highway police are traffic police who are responsible for managing highway traffic order, carrying out law enforcement duties on highways, and investigating highway traffic accidents. The highway traffic police is a professional branch of the people's police and an important component of the public security organs.