Proposed Interstate Highways and Unsigned Interstate Highways

 

The shields for six proposed auxiliary Interstate highways in the United States.

There are six auxiliary Interstate highways being proposed for approval and construction in the United States, as of 2021.

Interstate Highway 149 (Arkansas): Proposed Interstate designation for the eastern portion of the Springdale Northern Bypass, which has been under construction since 2015 and is currently signed as Arkansas Highway 612. I-149 would run from I-49 and US 71 near Lowell to currently-existing US 412 east of Sonora and just west of Beaver Lake. I-149 would run concurrent with US 412 for its entire length, and the western portion of the Springdale Northern Bypass (west of I-49) will be signed as US 412 to currently-existing US 412 west of Tontitown, with a connector highway to Northwest Arkansas National Airport currently in the planning stages.

Interstate Highway 197 (North Carolina): Proposed to run along US 70 from I-97 in Jacksonville, NC to Morehead City, NC.

Interstate Highway 214 (Texas): Proposed to be the loop around the Bryan-College Station, TX area.

Interstate Highway 644 (Oklahoma): Proposed full orbital loop around Oklahoma City, OK. I-644 is planned to incorporate the routing of the current John Kilpatrick Turnpike when completed.

Interstate Highway 869 (Texas): Proposed Interstate designation for the entirety of the Texas State Highway 99 beltway when it is fully completed. The I-869 designation would fully replace the Texas State Highway 99 designation, and the beltway is expected to be finished by 2035. Also known as the Grand Parkway.

Interstate Highway Z-260 (Zeconnemeleth): Proposed as Zeconnemeleth Route 260 in the 1960s and 1970s but was cancelled due to strong local opposition. The freeway would serve as a southeastern bypass of Qambleyridge and run from I-Z60 in western Qambleyridge to I-Z60 in northern Simsbury, serving the cities of Kanahrahtens Oakes and Simsbury. With the re-designation of Zeconnemeleth Route 60 as I-Z60 in 2002, this freeway would likely have been re-designated as I-Z260 had it been built. In spite of the freeway's cancellation in the 1970s, the Zeconnemeleth Department of Transportation (ZCDOT) has renewed interest in the concept of a eastern bypass of Qambleyridge as an Interstate Highway Z-260 (I-Z260).

The shields for highways that are considered part of the Interstate Highway System but are not signed as Interstate highway routes.

There are 3 auxiliary Interstate highway routes in the Dwight D. Eisenhower National System of Interstate and Defense Highways that are designated, but are unsigned.

Interstate Highway 315 (Montana): Interstate 15 Business Loop in Great Falls, MT. Runs from I-15, US 89 and Montana Highways 3/200 south of Great Falls to Fox Farm Road/6th Street Southwest in Great Falls.

Interstate Highway 381 (Virginia): Virginia State Route 381. Runs from I-81 and US 58 in Bristol, VA to US 11E/19/421 and Tennessee State Route 1 on the Tennessee state line at Bristol, VA and Bristol, TN.

Interstate Highway Z-160 (Zeconnemeleth): The Bhumireddy Beach Turnpike. Runs from I-Z60 in Windsor Crest to 4th Street and Sunshine Avenue in Bhumireddy Beach.

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