The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols and guidelines which are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public transportation as well.
The voting membership of AASHTO consists of the Department of Transportation of each state in the United States, as well as that of Puerto Rico and the District of Columbia. The United States Department of Transportation, some U.S. cities, counties and toll-road operators, most Canadian provinces as well as the Hong Kong Highways Department, the Turkish Ministry of Public Works and Settlement and the Nigerian Association of Public Highway and Transportation Officials have non-voting associate memberships.
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... are A Policy on Geometric Design of Highways and Streets, often called "The Green Book" because of the color of its cover ... This book covers the functional design of roads and highways including such things as the layout of intersections, horizontal curves and vertical ... Standard Specifications for Transportation Materials and Methods of Sampling and Testing ...
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