Interstate 180 (Wyoming)

Interstate 180
Interstate 180
	I-180 highlighted in red
Route information
	Auxiliary route of I-80
	Maintained by WYDOT
Length	1.09 mi (1.75 km)
Existed	1984–present
NHS	Entire route
Major junctions
South end	; I-80 / I-25 BL / US 85 / US 87 Bus. in Cheyenne
North end	; I-80 BL / US 30 / I-25 BL / US 85 / US 87 Bus. in Cheyenne
Location
Country	United States
State	Wyoming
Counties	Laramie
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Wyoming State Highway System; Interstate; US; State;

Interstate 180 (I-180) is a 1.09-mile-long (1.75 km) expressway in the US state of Wyoming between I-80 and downtown Cheyenne.

It is unusual for being one of the few Interstate Highways that does not conform to Interstate Highway standards. There is also no control of access anywhere along its route.^[1]^{[failed verification]} Other routes in Alaska and Puerto Rico are similar in nature, as they are funded by Interstate dollars but do not conform to Interstate Highway standards.^[2] The only grade separations are a diamond interchange at its southern end (at a junction with I-80) and a pair of bridges that run over 1st Street and the Union Pacific Railroad tracks. However, even the interchange with I-80 is a standard diamond with signalized intersections. There are five traffic signals along I-180.

I-180 is cosigned with I-25 Business Loop (I-25 BL), US Highway 85 (US 85), and US 87 Business (US 87 Bus.), making it the only concurrency of an Interstate, Interstate business route, US Highway, and US Highway business route. It is also the only auxiliary Interstate Highway in Wyoming.

^ ^a ^b Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved July 3, 2022.
^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved July 3, 2022.

[fhwat2-1] Starks, Edward (January 27, 2022). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved July 3, 2022.

[fhwat1-2] Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved July 3, 2022.

[1]

[2]