While there have been many studies analyzing crash severity, few studies have accounted
for unobserved heterogeneity and compared different crash severity models. The objective
of this paper is to investigate the differences between two preferred methods for
accommodating individual unobserved heterogeneity, the mixed logit and latent class
methods, in exploring the relationship between heavy truck crash severity and its
contributing factors. To achieve this, a large sample of crash data on multiple vehicle …