The concepts of "risk", "relative risk", "relative risk odds-ratio", "risk analysis methods" and "risk assessment/evaluation management" have been recognised as essential estimation techniques for measuring, monitoring and comparing the level(s) of risk existing on our highways and roads. Until recently there has been no co-ordinated initiative taken to investigate the feasibility of developing a standardised modelling framework and associated methodologies for estimating, evaluating, interpreting and assessing the accuracy of the various types of risk performance measure indicators. This paper reports on the status of research presently being conducted within Canada to address these deficiencies - the design development and implementation of a Risk Analysis and Evaluation System Model (RAESM). Ideas and concepts behind the model is presented. The modelling framework and the methodological approaches and procedures for the derivation of the three types of road travel risk performance indicators are discussed together with the accuracy of the estimator. The web-based system that is designed and developed for the implementation of RAESM is described.
Abstract