Professor Lorraine Mazerolle and her colleagues have demonstrated that when a procedurally just approach is applied, offending motorists are more likely to comply and accept the consequences (Mazerolle et al., Another advantage is an opportunity for other offences to be detected and dealt with - for example vehicle safety or driver licence offences, which are undetectable by automated enforcement. Most drivers and police officers have no difficultly in understanding the risks of travelling at speeds well in excess of the speed limits, however, many do not understand the risks associated with low level speeding. In fact, the prevalence of low level speeding presents a significant road safety risk and has to be addressed by applying strict enforcement thresholds. The New Zealand experience is that most drivers will travel at speeds below the level at which they perceive police will stop them. Therefore, New Zealand Police set clear standards of enforcement tolerance.