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And you can tell that it's a loop because it has an even first number. #: Main Highway ##: Main Highway [Even]##: Loop [Odd]##: Spur One of the great things a

And you can tell that it's a loop because it has an even first number. #: Main Highway ##: Main Highway [Even]##: Loop [Odd]##: Spur One of the great things about the interstate system.

madcaptenor 10y ago
That's sort of true, but "loop" just means that both ends are at interstates. See for example I-675 south of Atlanta, which runs from I-285 to I-75 in roughly a straight line.