Official papers reveal the Government ignored a proposed package of measures that would have revamped the approach to speed enforcement on the roads.
Among the measures proposed in a 2010 ministerial briefing note were demerit points for drivers caught by speed cameras.
Also included were lowering or removing speed camera fines to reduce perceptions they were used to gather revenue.
The Transport Agency says more speed cameras alone wouldn't achieve a transformation in driver behaviour and it proposed telling drivers where speed cameras were and why.
Transport Minister Gerry Brownlee says the proposals haven't been ruled out completely but he's not keen on demerit points for speed camera fines.
The Automobile Association says some of the measures could have had an impact.