Interstate number system

I 465 around Indy goes east-west or north-south, it depends on where you are at, I-74 runs from a few miles into Iowa where it spurs off from I-80 through IL and IN and ends on the west side of Cincinnati, OH when it intersects with I-75. It is considered east west.I-474 loops around Peoria, IL, it misses the city and is one mile longer. I-380 in IA joins Waterloo, IA to I-80 through Cedar Rapids, IA. It is 73 miles long from the south edge of Waterloo, through to I-80. It generally goes in a northwest southeast direction, but is considered north south for numbering purposes.

I 90 in IL is one that still is confusing, it crosses the skyway from the Indiana Toll Road, runs with I 94 up through Chicago, (Dan Ryan Expressway), becomes the John F. Kennedy Expressway, goes by O'Hare international Airport and becomes the NW Tollway, where it goes from Schaumburg to the Wisconsin border, parts of it seem to be numbered north to south or east to west.

 

Nebraska, other than the loops in Omaha.

 

Alaska also has no actual Interstates.