A Comparative Analysis of Powered Two Wheelers Crash Severity among Different Urban Areas

Powered Two-Wheelers are greatly represented in fatal crashes, above all in urban areas accounting for 21% of all road fatalities by mode of transport in EU. In an international comparison of PTWs crashes, Italy assumes a leadership accounting 30% of deaths on the total losses in crashes in urban area. In this paper a Bayesian approach is used to analyze proportion of PTWs fatal crashes with respect to total number involving a PTW in different urban areas in Italy. Proportion of fatalities is used as measure of severity risk which can be ranked in order to identify anomalous situations.