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Roadside Design Guide [American Association of State Highway and Transportation Officials] on Amazon.com. *FREE* shipping on qualifying offers. The American Association of State Highway and Transportation Officials (AASHTO). Roadside. Design Guide. The U.S. Department of Transportation - Federal“Yellow Book”. 1974 – 30' “Unencumbered Recovery Area”. 1989 – AASHTO published the first edition of the Roadside Design Guide. CLEAR ZONES! Design Standards—Interstate System, 1956, 1967, and 1991; and a number of other AASHO and. AASHTO policy and “guide” publications. An AASHTO publication is