Transportation Infrastructure of the United States 2017/2018
Border crossings that intersect the National Highway System (NHS) are shown. Major ports are ports with a commodity tonnage total of 10 million or more, in 2015. Airports with at least 750,000 enplanements or more, in 2015, are included on the map. Roads (Interstates; Non interstate) are the National Highway System (NHS) network. Railroad network includes Class I rail, as of 2016. State capitals and cities with a population of 250,000 or more, in 2014, are shown.
U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Atlas Database 2016. Natural Earth, Manual Shaded Relief of the Contiguous United States, 1:10 million; Manual Shaded Relief of the World, 1:50 million.