- Stretching for 3,101.77 miles and serving 13 states, I-90 is the longest interstate highway in the U.S.
- At 17.62 miles, I-97 from Annapolis to Baltimore is the shortest 2-digit interstate highway in the U.S.
- With 17 roads totaling 3,233.45 miles, Texas is the state with the most interstate highway miles
- At 16, I-95 is the interstate highway that traverses the most states
- 5 state capitols are not directly served by the interstate highway system: Juneau, AK; Dover, DE; Jefferson City, MO; Pierre, SD; and Carson City, NV
- The oldest segments of interstate highway, such as parts of the Pennsylvania Turnpike, pre-date the interstate highway system and were re-named and incorporated at a later time
