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Interstate 180 is the designation for three tertiary interstate routes in the United States; additionally, a fourth route in Wyoming is signed as "Interstate 180" as it received federal funds, but none of its length is interstate grade.
Illinois
Interstate 180 is a short 13.19-mile spur highway that travels from Princeton, Illinois to the small town of Hennepin, Illinois on its southern terminus. The freeway primarily exists to connect a steel plant in Hennepin to Interstate 80. The steel plant had been closed for many years until August 2002, when the plant reopened. Despite this, Interstate 180 is still one of the least traveled interstates in the nation, serving an average of 2,000 - 2,500 vehicles per day. (For comparable numbers, Interstate 190 connecting O'Hare to Chicago serves 109,000 vehicles per day, Interstate 80 serves 20,900 vehicles per day in that area, and remote Interstate 24 downstate serves 15,000 vehicles per day.)
The highway serves as an entrance point into the Peoria area from Interstate 80 and intersects U.S. Highway 6, Illinois Highway 26 and Illinois Highway 29.
Nebraska
Interstate 180 is a short spur highway that connects Interstate 80 in Lincoln, Nebraska to downtown Lincoln. The length of the highway is 3.18 miles.
Pennsylvania
Interstate 180 is a spur highway that connects Williamsport, Pennsylvania to Interstate 80 near Milton, Pennsylvania. The length of the highway is 28.85 miles.
See Interstate 80
External Resources
Illinois Department of Transportation Traveling Public website (http://www.dot.state.il.us/tpublic.html)
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