A comprehensive analysis of factors that influence interstate highway crash severity in Alabama

This paper identifies factors that influence the severity of interstate crash outcomes and how they vary depending on location manner collision. Four separate injury models were developed to explore differences similarities in between single-and multi-vehicle crashes occurred rural urban areas state. Random parameters multinomial logit with heterogeneity means variances modeling approach was used account for unobserved data. The model estimation results show some driver behavioral such as speeding, aggressive driving, failure use seatbelt, driving without a valid license found significantly contribute form outcome. roadway features type opposing lane separation, collision type, temporal lighting conditions also explored. Some associations these based unraveled. These findings are expected guide implementation countermeasures interstates. this study further support evidence analysis subsets data unravel underlying complex relationships within severity.