Future Interstate Highways

Dwight D. Eisenhower National System of Interstate and Defense Highways
Shields for future Interstates
Interstate Highways in the 48 contiguous states
System information
Formed:	June 29, 1956
Highway names
Interstates:	Interstate X (I-X)
System links
Interstate Highway System Main Auxiliary Suffixed Business Future

Future Interstate Highways include various proposals to establish new mainline (one- and two-digit) Interstate Highways in the United States. This does not include the numerous auxiliary Interstate Highways that are in various stages of planning and construction. Planned expansion of existing mainline interstates are also not included here.

Several Congressional High Priority Corridors have been designated as future parts of the Interstate System by the Intermodal Surface Transportation Efficiency Act and amendments. By law, they will become interstates when built to Interstate standards and connected to other interstates.

Interstate 3 is the proposed designation of an Interstate Highway Corridor under development in the southeastern U.S. It is planned to run from Savannah, Georgia, to Knoxville, Tennessee. Its number does not follow standard numbering conventions; under established numbering conventions I-3 would normally run west of I-5 along the Pacific Coast. The unnumbered Interstate was established by the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) legislation that also provided for Interstate 14. The "Interstate 3" designation has not been officially accepted by AASHTO or the FHWA, but is being used by the Georgia Department of Transportation and others to identify the highway. The number comes from the 3rd Infantry Division which is based in Georgia. Portions of the planned route, including the Savannah River Parkway, are already built to Interstate standards; the exact route has not been finalized, especially across the Appalachian Mountains north of Augusta, Georgia.