Delineation investment priorities

The purpose of this research was to develop a cost management tool that will assist in prioritising delineation treatments that have added safety benefits compared with standard road markings. The tool calculates a benefit / cost (B/C) ratio for a given road segment (rural mid-block, rural curve and rural bridge) based on road parameters, delineation improvement details and an associated crash reduction factor based on the delineation improvement. The results of a limited number of analyses of the effect of audio-tactile profiled (ATP) road markings on crashes in New Zealand are in agreement with overseas literature and provide a degree of validation for the cost management tool that has been developed.