X-Nico

2 unusual facts about American Association of State Highway and Transportation Officials


Stopping sight distance

The design standards of the American Association of State Highway and Transportation Officials (AASHTO) allow 1.5 seconds for perception time and 1.0 second for reaction time.

Tom Moreland

Mr. Moreland is a Past President of American Association of State Highway and Transportation Officials; former Vice Chairman of the U.S. Transportation Research Board; and a current member of the Georgia State Board of Registration for Professional Engineers and Registered Land Surveyors.


Highway engineering

Design policies standards used in the United States are typically based on publications of the American Association of State Highway and Transportation Officials as well as research promulgated by the Transportation Research Board, the Institute of Transportation Engineers, the Federal Highway Administration, and the Department of Transportation.

Interstate 99

Unlike most Interstate Highway numbers, which were assigned by the American Association of State Highway and Transportation Officials (AASHTO) to fit into a grid, I-99's number was written into Section 332 of the National Highway Designation Act of 1995 by Bud Shuster, then-chair of the U.S. House Committee on Transportation and Infrastructure, the bill's sponsor, and the representative of the district through which the highway runs.


see also