AASHTO means American Association of State Highway and Transportation Officials. It is a standards setting body which publishes specifications, quality...

States includes a system called the Interstate Highway system, controlled by AASHTO, where major north/south routes are odd numbered and east/west are even...

the American Association of State Highway and Transportation Officials (AASHTO) to sign the interstate as I-495 as an auxiliary route of I-95. I-495 would...

Officials. November 10, 1958. pp. 2–3. Retrieved October 8, 2021 – via AASHTO Route Numbering Archive. "2020 Cross Reference Table of Highway Route Number...

System. AASHTO Special Committee on U.S. Route Numbering U.S. Numbered Highways - 1989 Edition Archived 2007-02-04 at the Wayback Machine (AASHTO) Highway...

The American Association of State Highway and Transportation Officials (AASHTO) no longer signs these letters. Current divided routes can be removed as...

its current western endpoint. Its route number does not follow the usual AASHTO numbering scheme, as there is no "parent" US 0. US 400 begins in Granada...