Abstract
This study describes the interstate trucking industry and the impacts on the industry resulting from non-uniformity among state laws and regulations governing truck sizes and weights. Based on numerous existing data sources including the Truck Weight Studies and the Census of Transportation, a commodity flow network was generated from which estimated changes in interstate truck mileage and equivalent axle loads were made for various options of new levels of truck size and weight uniformity. Operating cost nomographs for various truck types and pavement condition curves were developed for the analysis. (Author/publisher)