The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States.

[7][dubious – discuss] The American Association of State Highway Officials (AASHO) was founded on December 12, 1914.

[7] Its name was changed to American Association of State Highway and Transportation Officials on November 13, 1973.

The name change reflects a broadened scope to cover all modes of transportation, although most of its activities are still specific to highways.

For example, a contract for the construction of a highway bridge may require a minimum compressive strength for the concrete used.