This report describes the calculation of accident rates for different vehicle types, using vehicle-miles travelled as the measure of exposure. Rates are reported for passenger cars, single-unit trucks, combination trucks, buses, and motorcycles on various highway types. Highway types are broken down by functional classificaion, administrative classification, number of lanes, and rural or urban location. Generally motorcycles had the highest rates and passenger cars had the lowest, although this varied by highway type.

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The contents of this report reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Department of Transportation, nor the Federal Highway Administration. This report does not constitute a standard, specification, or regulation.