Interstate 172

Interstate 172 spurs north from I-72 near Hannibal, Missouri and Hull, Illinois to Quincy along the Missouri River. The rural freeway originates 0.80 miles south of the Adams County line at a trumpet interchange with Interstate 72 within Pike County.

I-172 extends 18.89 miles north within Adams County to U.S. 24 beyond the city of Quincy. Illinois State Route 110, the Chicago Kansas City Expressway (CKC), overlaps with the entire length of I-172. The CKC continues north from the Interstate along IL 336, a controlled access, at-grade expressway to Mendon, Loraine, U.S. 136 at Carthage.

Interstate 172 Guides

• North
• South

The Central Illinois Expressway (CIE) extending north from the Pike County line to Quincy and U.S. 24 was originally designated as Illinois State Route 336. The Illinois Department of Transportation (IDOT) initially proposed designating it, and the CIE, U.S. 36 from near Hull to Springfield, all as Interstate 172. Plans changed by 1995, with I-72 outlined along U.S. 36 (Central Illinois Expressway) and the spur to Quincy as Interstate 172. The American Association of State Highway and Transportation Officials (AASHTO) approved the numbering plan on April 22, 1995.

A 7.5 mile long section of the Central Illinois Expressway opened to traffic on August 17, 1989 at an opening ceremony attended by Governor James Thompson. Designated IL 336, the section costing $42 million to build extended north from IL 57 near Fall Creek to IL 96 southeast of Quincy.¹ The CIE was completed at Hull on November 15, 1991. This included the link with IL 336, the Springfield-to-Quincy stretch.²

scenes

1083rd Lane north becomes IL 57 at the folded diamond interchange with I-172/IL 110 (CKC) near Fall Creek. Previous guide signs for the northbound entrance ramp referenced Mt. Sterling for the connection with U.S. 24 east and Keokuk, Iowa for IL 96 north from Quincy. 04/13/13

Among other roads between Hannibal, Missouri and Chicago, IL 110 (Chicago Kansas City Expressway) was established in 2010 along all of Interstate 172. 04/13/13

Interstate 172 heads south from IL 57 across the Pike County line to conclude at I-72/U.S. 36 (Central Illinois Expressway). 04/13/13

I-172/IL 110 south to I-72/U.S. 36 west leads to Hannibal and east to Pittsfield and Jacksonville. 04/13/13

Photo Credits:

04/13/13 by AARoads

Connect with:
Interstate 72
U.S. 24

Page Updated 11-13-2023.