AASHTO

American Association of State and Highway Transportation Officials (AASHTO)

A leading source of technical information on design, construction and maintenance of highways and other transportation facilities, including aviation, highways, public transit, rail, and water. We provide all AASHTO specifications, provisional standards, standard test methods, recommended practices, guide specifications, manuals, the Bridge Welding Code, annual meeting procedures, the Reference Book of Member Department Personnel & Committees, U.S. Numbered Highways, and interstates research.

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