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| | The Great American RoadTrip Forum - Do interstate numbers have meanings? (Site not responding. Last check: 2007-11-05) |
 | | For three-digit Interstate numbers, the first digit indicates what kind of route it is, and the last two digits give the main Interstate that the route is part of. |
 | | If the first digit of a three-digit Interstate is even, the route is a bypass [or beltline] that connects at both ends to the main Interstate... |
 | | I-10 is the southernmost east-west Interstate, and the numbers increase as you move north [10, 20, 44, 70, 94]. |
| www.roadtripamerica.com /forum/archive/index.php?t-6079.html (534 words) |
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