List of future Interstate Highways
| Dwight D. Eisenhower National System of Interstate and Defense Highways | |
|---|---|
| Shields for future Interstates | |
Proposed Interstate Highways in December 2015 | |
| System information | |
| Formed | June 29, 1956 |
| Highway names | |
| Interstates | Interstate X (I-X) |
| System links | |
In the United States, future Interstate Highways include proposals to establish new mainline (one- and two-digit) routes to the Interstate Highway System. Included in this article are auxiliary Interstate Highways (designated by three-digit numbers) in varying stages of planning and construction, and the planned expansion of existing primary Interstate Highways.