Good drivers could be given merit points as part of new measures to improve the demerit system.
The New Zealand Transport Agency's road safety director, Ernst Zollner, stopped short of saying the demerit system was not working, but admitted to Radio New Zealand that improvements were needed.
Mr Zollner said the agency was working on several ideas, including a merit system for drivers who never get tickets, and demerit points for those caught by fixed cameras.
"There's a few other ideas, for example you have stepped fines: on your first offence you've gone 60km/h in a 50km/h zone and you get a $30 fine, your next ticket might be $60 and your next one after that, $120."
No decisions on changes had been made yet, but the ultimate goal was to prevent crashes and save lives, and also keep up with overseas trends, he told Radio New Zealand.