Special Committee on U.S. Route Numbering (October 17, 2008). "Special Committee on U.S. Route Numbering Meeting Minutes" (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original(DOC) on October 16, 2017. Retrieved October 30, 2008.
Special Committee on U.S. Route Numbering (October 17, 2008). "Special Committee on U.S. Route Numbering Meeting Minutes" (Report). Washington, DC: American Association of State Highway and Transportation Officials. Archived from the original(DOC) on October 16, 2017. Retrieved October 30, 2008.