Revenue-collection data from toll roads allow for accurate estimates of miles driven by vehicle type and, when combined with crash data, valid estimates of crash involvement per mile driven. Data on New York. In addition, state crash files and published vehicle-miles of travel were obtained for toll roads in Illinois, Indiana, Ohio, and Pennsylvania. Large commercial motor vehicles were significantly under involved in single-vehicle crashes on all state toll roads. Commercial motor vehicles; the exceptions were Kansas, where they had significantly lower multiple-vehicle involvement rates, and Indiana, where there were no significant differences in multiple-vehicle involvement by vehicle type. The risk of commercial motor vehicle involvement on multiple-vehicle crashes resulting in deaths or serious injuries was double that of passenger vehicles in the two states (Ohio and Pennsylvania) that identified serious injuries. Whether crash rates for commercial motor vehicles are higher or lower than those for passenger vehicles appears to depend on the type of crash, specific toll road, and traffic density. (A)
Abstract