Interstate 172

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Interstate 172
Auxiliary route of the Interstate Highway System

Length:

19.69 mi (31.69 km)

Formed:

1995

South end:

I-72 in Fall Creek

North end:

US 24/IL 336 west of Fowler

Illinois state highway system
< ILL 171		ILL 172 >

Interstate 172 (abbreviated I-172) is a spur route off of Interstate 72. The 22 mile (35 km) highway runs north from its start outside of Hannibal, Missouri to just two miles west of Fowler, Illinois. At U.S. Highway 24, Interstate 172 becomes Illinois Route 336, which runs north to Carthage, Illinois.

1 Route description
2 Exit list
3 History
4 Future
5 References

[edit] Route description

Interstate 172 is a four-lane freeway located entirely within the state of Illinois. It is also known as the Strieby Expressway, and together with Interstate 72 comprises the Central Illinois Expressway from Springfield to Quincy.

Major cities
Quincy, Illinois

[edit] Exit list

Italicized destinations are not explicitly shown on signage.

County	Location	Mile	#	Destinations	Notes
Adams	Fall Creek	0.0	0	Interstate 72 — Springfield, Illinois, Hannibal, Missouri	Southern terminus of Interstate 172.
	Fall Creek		2	Illinois Route 57 — Marblehead, Downtown Quincy
	Payson		10	Illinois Route 96 - Payson Street, 36th Street
	Hickory Grove		14	Illinois Route 104 — Broadway, Quincy Airport, Quincy
	Quincy		18	Columbus Road, Wismann Lane
	Fowler	19.7	19	U.S. Route 24, To Illinois Route 96 — Keokuk, Iowa, Mount Sterling, Illinois	Northern terminus of Interstate 172 — becomes Illinois Route 336 North.

[edit] History

Interstate 172 originally was what Interstate 72 is now from Hannibal, Missouri to the current interchange with I-172. This was approved by the American Association of State Highway and Transportation Officials (AASHTO) on June 9, 1991.

On April 23, 1995, after a re-examination by the Federal Highway Administration, the highway to Hannibal was redesignated I-72, with the highway north to Quincy redesignated as Interstate 172. The highway is non-chargeable, meaning that even though it is an Interstate, it was not built with federal funds.^[1]

[edit] Future

After Interstate 172 was completed, the Illinois Department of Transportation continued development of the 4-lane highway as Illinois Route 336. Construction is ongoing (as of March 2007) just east of the Carthage area, where Illinois Route 336 bypasses the city of Carhage to the south and east and intersects with US 136 where it becomes two-lane to Macomb until further construction completed. A study is currently underway to extend Illinois 336 to Peoria, Illinois. A bypass around Macomb, Illinois is also expected, which would make the "Avenue of the Q's" (Quincy - Quad Cities via I-172, IL-336, US 136, US 67, and I-74) four lanes as well.