Documents by American Association of State Highway and Transportation Officials

A Policy on Design Standards—Interstate System

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A Policy on Design Standards—Interstate System, American Association of State Highway and Transportation Officials, Washington, D.C., July 1991).

Wikipedia Article: 7/9/13

Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials (AASHTO) in the publication A Policy on Design Standards - Interstate System. For a certain highway to be considered an Interstate, it must meet these construction requirements or obtain a waiver from the Federal Highway Administration.