From: utzoo!decvax!harpo!ihps3!ihuxu!dafa Newsgroups: net.general Title: Interstate Highway numbering Article-I.D.: ihuxu.110 Posted: Fri Sep 17 16:21:58 1982 Received: Tue Sep 21 09:59:42 1982 Circumferential interstate highways are assigned three digit route numbers. The last two digits are the same as the interstate route they connect to. But what is the significance of the first digit? David Fay ihuxu!dafa