What were the original plans for Interstates?
The Interstate System’s original plans are detailed in a publication called General location of national system of interstate highways, including all additional routes at urban areas designated in September, 1955, commonly known as the “Yellow Book”. Go to http://www.ajfroggie.com/roads/yellowbook/ or http://www.roadfan.com/intreg.html#yellowbk for much more information including maps. See also http://www.roadfan.com/5758int.html .