This study has investigated the crash effects of the Queensland speed camera program over the period from its introduction to the end of June 2001 in areas within 6 kilometres of speed camera sites that had been used up to the end of the study period. When operating at maximum coverage, the Queensland speed camera program was estimated to have produced a reduction in fatal crashes of around 45 per cent in areas within 2 kilometres of speed camera sites. Comparison of the estimated crash reductions and program operational measures showed variations in estimated crash reduction over time were strongly related to the size of the overall program and the density of enforcement. Periods of program growth were also associated with larger crash reductions beyond that expected from the increasing size of the program alone. Higher levels of true randomness in selection of speed camera sites for operation was also associated with higher levels of crash reduction when comparing differential performance of the program across police regions in Queensland. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E210298.
Samenvatting