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Interstate 172
Interstate Highway in Illinois / From Wikipedia, the free encyclopedia
"I-172" redirects here. For the Japanese submarine I-172, see Japanese submarine I-72.
Interstate 172 (I-172) is a spur route, the only auxiliary route of I-72. It is located 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.[2] I-172 is 19.69 miles (31.69 km) long.[1]
Quick Facts Route information, Length ...
I-172 highlighted in red | ||||
Route information | ||||
Auxiliary route of I-72 | ||||
Maintained by IDOT | ||||
Length | 19.69 mi[1] (31.69 km) | |||
Existed | 1995–present | |||
NHS | Entire route | |||
Major junctions | ||||
South end | ![]() ![]() ![]() ![]() | |||
North end | ![]() ![]() ![]() ![]() | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Pike, Adams | |||
Highway system | ||||
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