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U.S. Department of Transportation Comprehensive Truck Size and Weight Study

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The federal government regulates commercial motor vehicle weights and dimensions on the National Network, a system of Interstate and other highways that carry the majority of heavy truck travel. These regulations directly affect a number of policy areas including safety, economic productivity, environmental enhancement, energy conservation, and infrastructure preservation. Because truck size and weight limits affect so many different policy areas, they often are quite controversial. The Office of Transportation Policy Studies develops data and analytical tools to provide decision makers with fact-based information on the many potential impacts of federal truck size and weight options. The Department of Transportation transmitted the Comprehensive Truck Size and Weight Study (TS&W) to Congress on August 31, 2000. The study was initiated in 1994 by Secretary of Transportation Rodney E. Slater, who was then the Federal Highway Administrator. The study is intended to provide decisionmakers with fact-based information regarding highly controversial and multifaceted truck size and weight issues.


Western Uniformity Scenario Report, also available in PDF (1.24 MB PDF)

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