The number of speed cameras on the roads could double in the next three years.
Some $10 million of road policing money has been set aside to buy new cameras.
Associate Transport Minister Simon Bridges says estimates show that 25 speed cameras can be purchased for about $4 million, so dozens could potentially be added to the 55 currently being used.
Mr Bridges says it's likely there will be a mix of fixed and mobile cameras, and newer technology such as point to point cameras could be looked at.
He says the introduction of more speed cameras will slow down drivers and save lives.
Road safety charity Brake chief executive Mary Williams agrees, saying speed cameras are of proven value in preventing fatalities and will be a wise investment.
But road safety consultant Hamish Piercy, who was a police officer for more than a decade, is not convinced that speed cameras have reduced crash statistics.
Mr Piercy says more cameras will mean more fines, and the perception that cameras are aimed at revenue-gathering will, if anything, increase.
Since 2005, more than 3.2 million speed camera tickets worth more than $271 million have been issued. Revenue from fines goes directly to the Government.