A study was undertaken to evaluate effects of Advanced Warning Flashing Lights (AWFLs) at a sample of 25 intersections on Perth metropolitan highways having open road section speed limits ranging from 70 to 100 kilometres per hour. It showed that there was a reduction of 5 fatal crashes after the installation of the lights at the affected 400 m approach road sections including the intersections. The AWFLs were found to be associated with significant change in types of crashes such that more severe crashes were reduced and less severe crashes increased. Estimates of effects of AWFLs in terms of cost of crashes suggested that the reduction in the costs was in the range between $14,000 and $139,000 per intersection per annum. It is estimated that AWFLs may reduce cost of crashes by up to 22 per cent. It was estimated that AWFLs were at least three times more effective in reducing cost of crashes involving heavy vehicles than the cost of crashes involving other types of vehicles. (Author/publisher) For the covering entry of this conference, please see ITRD abstract no. E210298.
Abstract