Interstate Highway System]]> Express highways]]> Highway planning]]> Roads--Design and construction]]> United States]]> U.S. Bureau of Public Roads]]>
Text available to read at https://www.google.com/books/edition/General_Location_of_National_System_of_I/IePIGnzx3yMC?hl=en&gbpv=0

Map accessed on Wikimedia Commons, https://commons.wikimedia.org/wiki/File:Interstate_Highway_plan_September_1955.jpg]]> The Federal Highway Administration (Publisher--map)]]> U.S. Government Printing Office (Publisher--print)]]> https://rightsstatements.org/page/NoC-US/1.0/?language=en]]>