List of future Interstate Highways

Dwight D. Eisenhower National System of Interstate and Defense Highways
Highway 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
Interstate Highway System Main Auxiliary Suffixed Business Future

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.