Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Numbered highways in the United States?
Summarize this article for a 10 year old
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.
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