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List of future Interstate Highways
| Dwight D. Eisenhower National System of Interstate and Defense Highways | |
|---|---|
.svg) .svg) Shields for future Interstates | |
 Proposed Interstate Highways in December 2015 | |
| System information | |
| Formed | June 29, 1956[1] |
| 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.
- ^ Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. 60 (1). Washington, DC: Federal Highway Administration. Retrieved March 16, 2012.
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