Interstate 180 (Wyoming)
||This article's lead section may not adequately summarize key points of its contents. (June 2012)|
|North Greeley Highway|
|Maintained by WYDOT|
|Length:||1.09 mi (1.75 km)|
|Existed:||1984 – present|
I-80 / I-25 Bus. / US 85 / US 87 Bus. in Cheyenne
|North end:|| I-80 Bus. / US 30
I-25 Bus. / US 85 / US 87 Bus. in Downtown Cheyenne
It is unusual for being the only Interstate Highway that is not up to Interstate Highway standards (or even a freeway) anywhere on its route. The only grade separations are a standard diamond interchange at its southern end at I-80 and bridges over 1st Street and the Union Pacific railroad tracks. It is a divided at-grade expressway with a 40 mph (64 km/h) speed limit due to the frequency of signals. There are five traffic signals along I-180. This is nowhere near Interstate standards, but it received federal funding under the Interstate Highway program.
I-180 is cosigned with Business Loop Interstate 25, U.S. Highway 85 and U.S. Highway 87 Business, making it the only concurrency of an Interstate, a Business Loop Interstate, a U.S. route and a Business U.S. route.
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Junction list 
I-25 Bus. south / US 85 south / US 87 Bus. south – Greeley
|Continuation beyond southern terminus|
|0.00||0.00||I-80 – Laramie, Pine Bluffs||Interchange|
|0.20||0.32||1st Street||Grade separation|
|0.40||0.64||5th Street||Traffic signal|
|0.70||1.13||9th Street||Traffic signal|
|1.09||1.75||I-80 Bus. / US 30 (Lincolnway) – Laramie, Pine Bluffs|
I-25 Bus. / US 85 north / US 87 Bus. north – Wheatland, Torrington
|Continuation beyond northern terminus|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- FHWA Route Log and Finder List - Interstate System - Design - FHWA
- It isn't clear whether Lincolnway, the road at the northern terminus of I-180 is US 30 or BUS US 30.  There are Business US 30 shields where W Lincolnway splits off from I-80 (Photos: ,  from ) and on E Lincolnway (Photos: ,  from ) but there are East US 30/West US 30 shields at other places, including the I-180 junction. 
- Photos showing road signs and traffic lights on I-180:  from ,  and  from .
- "Reference Marker Book" (PDF). Wyoming Department of Transportation. November 2004. Archived from the original on 2007-03-11. Retrieved 2007-03-10.
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