Back Carreteras de Estados Unidos Spanish Autoroutes numérotées aux États-Unis French Классификация нумерованных автомагистралей в США Russian 美国的编号公路 Chinese
Highways are split into at least four different types of systems in the United States: Interstate Highways, U.S. Highways, state highways, and county highways. Highways are generally organized by a route number or letter. These designations are generally displayed along the route by means of a highway shield. Each system has its own unique shield design that will allow quick identification to which system the route belongs.