The organized State Highway System of the U.S. state of Illinois comprises all of the state routes in the state. The Illinois Highway Code (605 ILCS 5)...

The Illinois State Toll Highway Authority (ISTHA) is an administrative agency of the U.S. state of Illinois charged with building, operating, and maintaining...

Illinois Routes are the highways in the State Highway System of the U.S. state of Illinois that are not simultaneously part of the Interstate Highway...

Interstate Highways in Illinois are all segments of the Interstate Highway System that are owned and maintained by the U.S. state of Illinois. The Illinois Department...

Interstate 88 (I-88) is an Interstate Highway in the US state of Illinois that runs from an interchange with I-80 near Silvis and Moline to an interchange...

S. Route 66 or U.S. Highway 66 (US 66 or Route 66) was one of the original highways in the United States Numbered Highway System. It was established on...

27, 2022. Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved November 8, 2007. System Map (Map). Illinois State Toll Highway Authority...

Skyway to the Indiana state line. The Jane Addams and Chicago Skyway are toll roads maintained by the Illinois State Toll Highway Authority (ISTHA) and...

Interstate 190 (I-190) is an auxiliary Interstate Highway in the US state of Illinois. I-190 runs west from I-90 to O'Hare International Airport, for...

Illinois Route 83 (IL 83) is a 91.73-mile-long (147.63 km) major north–south state highway in northeast Illinois. It stretches from U.S. Route 30 (US 30...

Illinois Route 38 is an 88.86-mile-long (143.01 km) west–east state highway that runs across northern Illinois. It runs from U.S. Route 52 (US 52) in downtown...

six-mile (9.7 km) electronic toll highway and a beltway that is currently under construction near Chicago, Illinois; it will run along the west side of...

Illinois Route 31 (IL 31) is a 58.41-mile-long (94.00 km) north–south state highway in northeastern Illinois, United States. It travels from U.S. Route 34...

Illinois Route 2 (IL 2) is a north–south state highway in northern Illinois. It currently starts at Illinois Route 40 in Sterling and ends at the Wisconsin...

southbound I-294 traffic exiting to westbound I-88. In 2020, the Illinois State Toll Highway Authority began construction of an estimated $700–$800 million...

U.S. Route 45 (US 45) in the state of Illinois is a major north–south U.S. Highway that runs from the Brookport Bridge over the Ohio River at Brookport...

of the Interstate Highway System that travels from Cove Fort, Utah, to Baltimore, Maryland. In the US state of Illinois, the highway travels 160 miles...

part of the Interstate Highway System that runs from San Francisco, California, to Teaneck, New Jersey. I-80 enters Illinois from Iowa in the west, southwest...

north–south Interstate Highway in the US state of Illinois that connects St. Louis, Missouri, to the Chicago metropolitan area. It enters the state from Missouri...

Interstate 39 (I-39) is a highway in the Midwestern United States. I-39 runs from Normal, Illinois, at I-55 to State Trunk Highway 29 (WIS 29) in the town...

Interstate 57 (I-57) is a north–south Interstate Highway in Missouri and Illinois that parallels the old Illinois Central Railroad for much of its route. It...

and Illinois Route 17 (Dixie Highway), which overlap in Momence. This is a distance of 7.40 miles (11.91 km). Illinois 114 follows the southern bank...

Illinois Route 56 (IL 56) is a 32.52-mile-long (52.34 km) east–west state highway in northern and northeastern Illinois. It runs from the interchange...

Illinois Route 116 (IL 116) is a 176.07-mile-long (283.36 km) cross-state rural state highway that runs from U.S. Route 34 (US 34) by Gladstone east to...

The State Trunkline Highway System consists of all the state highways in Michigan, including those designated as Interstate, United States Numbered (US...

Illinois Route 43 (IL 43) is a 60.30-mile-long (97.04 km) major north–south state highway in the U.S. state of Illinois. It runs from U.S. Route 30 (US 30)...

Illinois Route 84 (Route 84 or IL 84) is a long state highway that runs along the Mississippi River in northwestern Illinois. Illinois 84 runs from south...

Illinois Route 58 (IL 58, Illinois 58), also known as Golf Road for most of its route, is a state highway in northeast Illinois. It runs from Illinois...

January 4, 2021. Cline, Michael B. (October 3, 2011). "State Byway Designation for Lincoln Highway Byway" (PDF). Letter to Lt. Gov. Becky Stillman. Indianapolis:...

United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide...