A Comparison of Factors Associated with Run-off-Road and Non Run-off-Road Crashes

Abstract

Run-off-road (ROR) crashes have become a major cause of serious injuries and fatalities. Crash data from Kansas, United States of America (U.S.A.) is used in this study to examine the trends in ROR crashes related to non-ROR crashes. Various factors such as environment, roadway, driver, vehicle and factors contributing to ROR and non-ROR crashes were analysed developing crash severity models so that potential countermeasures can be developed to improve roadside safety. Different factors that affected on ROR crashes and non-ROR crashes were identified using the models. Results indicated that some variables are significantly related to ROR crash severity but not non-ROR crash severity and vice versa.