What's the word you use for this kind of road? (please add your location)

[fishwax]

49. that's an interesting and cool map, though it has a few weird glitches

For instance, I-57 doesn't show up on there at all--it starts at Chicago and ends at 55 between St. Louis and Memphis, and is the fastest route from Chicago to Memphis and further points south.

I-25 does end in Buffalo, as shown on the map, but it is Buffalo, Wyoming, which is south of Billings. Buffalo should really be on the I-90 line between Billings and Sioux Falls. Then I-94 should start in Billings rather than Butte (which is, as the map shows, at the junction of 90 and 15, just not 94) and shoot up to Fargo. 94 should also shoot down to Chicago from Minneapolis/St. Paul.

There may be other issues, I don't know--those are just the ones that jump out at me. Still, it's kind of a fascinating map--any idea where it came from?