List of future Interstate Highways
Wikimedia list article

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.
Congressionally designated future Interstates
Several Congressional High Priority Corridors have been designated as future parts of the Interstate Highway System by the Intermodal Surface Transportation Efficiency Act (ISTEA) in 1991 and amendments to Section 1105. By law, they will become interstates when built to Interstate standards and connected to other interstates.
Interstate 7 or 9
State Route 99 has been designated as a future Interstate Highway corridor between Wheeler Ridge and Sacramento. The route would be designated as I-7 or I-9, remaining in line with the national numbering system. Differing proposals show the route ending in Stockton or Sacramento. Designation is contingent upon completion of the "Route 99 Corridor Enhancement Master Plan". Although scattered improvement projects have been completed, there is currently no timeline or funding for the completion of the plan.
Future Auxiliary Interstate Highways
Interstate 195 (Washington D.C.)
The current Interstate 695 will be eliminated and be replaced with an extension of Interstate 395.
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