The National Highway System was designated in 1995 for all roads that are of national importance. Generally, this includes all Interstate routes and some U.S. and state routes. See National Highway System for more information and a map.
About the Author: Alex
Cofounder of AARoads.com. Webmaster of both AARoads and Interstate-guide.com. Former cartographer for Mapsource, Inc. and Universal Map Group, LLC. Map specialist for GIS Cartography & Publishing Services.
Leave A Comment