A review was undertaken of 243 crashes studied in-depth in order to assess the potential these cases had of having traffic engineering and related environmental countermeasures applied to them. Only crashes involving heavy vehicles, pedestrians and cycles which occurred in the outer western suburbs of sydney, during the specific study period were examined. It was found that each study group had a substantially different distribution of countermeasure potential. The countermeasures suggested for the heavy vehicle group were classified primarily as "specific site treatment", this treatment mostly taking the form of intersection priority control. The pedestrian group, however, mostly contained countermeasure suggestions which were broadly applicable; for example, the prohibition of on- street parking in order to eliminate the sight obscuring parked vehicle. Finally, it was found that almost half of the countermeasures derived from the motorcycle group were classified as having "no traffic solution". There were four frequently identified traffic related countermeasures derived from the review which were broadly applicable. These were: the selective prohibition of on-street parking, the daytime illumination of motorcycle headlamps, the provision of adequate roadshoulder widths, and the elimination of roving "ice-cream vans".
Abstract