1 AN EMPIRICAL ANALYSIS OF FATALITY RATES FOR LARGE TRUCK INVOLVED CRASHES ON INTERSTATE HIGHWAYS

Few studies have analyzed the impacts of freight movements (large truck) on crash rates. This study explores a novel application of a method to large truck movements, namely the random parameters tobit regression model, by examining crash rates (instead of frequencies) in truck-miles traveled and ton-miles of freight in the US as continuous censored variables. Using a nationwide crash database, the empirical results illustrate that the random-parameters tobit regression model provides an increase understanding of the factors determining large truck crash rates