Crash effects of the new Queensland Graduated Licensing System: A preliminary evaluation

A new Graduated Licensing System (GLS) were introduced in Queensland on July 1 2007 with key changes including doubling the minimum learner period, a mandatory minimum 100 logbook hours of supervised driving for learner drivers, a 2-phase probationary licence period, mandating display of L and P plates and late night peer passenger restrictions. The aim of this study was to evaluate the overall crash effects associated with the introduction of the new Queensland GLS. Changes in novice driver crash rates per licensed driver year of from before to after introduction of the new GLS were compared to parallel changes in 25-35 year old experienced drivers over time to measure the net crash effect associated with the new GLS. Analysis was undertaken by crash severity level at the global program level as well as for specific license phases where there was sufficient data. Introduction of the Queensland GLS was associated with a 30% reduction in novice driver fatal crashes (p=0.025) and a 13% reduction in novice driver fatal and serious injury crashes combined (p<0.001). A 30% fatal crash reduction (p=0.03) for first year probationary drivers and 26% reduction in fatal and serious injury learner driver crashes (p=0.0018) were also estimated. Analysis also provided some insight into the likely long term effects of the program. Evaluation of the new Queensland GLS has further confirmed the value of comprehensive graduated licensing systems in reducing novice driver road trauma.