List of auxiliary Interstate Highways

• Here is a list of 3-digit Interstates. They go in the order of Primary Interstate, the state the 3-digit Interstate is in, and some branches of the 3dis (i.e. tertiary of primary, and so on).

• I-75
  • Florida
    • I-275 (Florida)
      • I-175 (Tampa, FL)
      • I-375 (Tampa)
  • Georgien
    • I-475 (Macon)
    • I-575 (Canton)
    • I-675 (Atlanta)
  • Michigan
    • I-275 (metro Detroit)
    • I-375 (downtown Detroit)
    • I-475 (Flint, MI)
    • I-675 (Saginaw, MI)
  • Ohio
    • I-275 (Cincinnati, OH)
    • I-475 (Toledo, OH)
    • I-675 (Dayton, OH)
• I-80
  • Ohio
    • I-280 (Toledo, OH)
• I-96 (only in the state of Michigan)
  • • I-196 (from Grand Rapids, MI to Benton Harbor, MI)
    • I-496 (Lansing, MI)
    • I-696 (metro Detroit)

• A list of 3di superlatives:

1. Only orphan: I-238 (California)
2. Shotest: I-375 (Michigan)

This list is incomplete, encourage some Wikipedians who know alot about the Interstate highway system to expand this list until it is complete.