Interstate 172

Interstate 172
Interstate 172
	I-172 highlighted in red
Route information
	Auxiliary route of I-72
	Maintained by IDOT
Length	19.69 mi (31.69 km)
Existed	1995–present
NHS	Entire route
Major junctions
South end	; I-72 / US 36 / IL 110 (CKC) in Hull
North end	; US 24 / IL 110 (CKC) / IL 336 in Quincy
Location
Country	United States
State	Illinois
Counties	Pike, Adams
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

Interstate 172 (I-172) is a spur route from I-72 entirely within the US state of Illinois and is completely concurrent with IL 110. The highway runs north from its start outside of Hannibal, Missouri, to about 2.5 miles (4.0 km) west of Fowler. At U.S. Route 24 (US 24), I-172 becomes Illinois Route 336 (IL 336), which runs north and east to Macomb via Carthage. The entire portion of I-172 and I-72 from I-172 east to Springfield is also known by its former name, the Central Illinois Expressway. I-172 is 19.69 miles (31.69 km) long.

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