 | This article needs additional citations for verification. (October 2023) |
 Interstate 90 | ||||
|---|---|---|---|---|
 I-90 highlighted in red | ||||
| Route information | ||||
| Maintained by ISTHA, IDOT, and SCC | ||||
| Length | 123.89 mi[1] (199.38 km) | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end |   I-39 / I-90 at Wisconsin state line | |||
| ||||
| East end |   I-90 Toll / Indiana Toll Road at Indiana state line | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Winnebago, Boone, McHenry, Kane, Cook | |||
| Highway system | ||||
| ||||
Interstate 90 (I-90) in the US state of Illinois runs roughly northwest-to-southeast through the northern part of the state. From the Wisconsin state line at South Beloit, it heads south to Rockford before heading east-southeast to the Indiana state line at Chicago. I-90 traverses 124 miles (200 km) through a variety of settings, from farmland west of the Fox River Valley through the medium-density suburbs west of O'Hare International Airport, through Downtown Chicago, and through the heart of the industrial southeast side of Chicago before entering Indiana.
I-90 comprises several named highways. The Interstate runs along the Jane Addams Memorial Tollway (previously called the Northwest Tollway) from South Beloit to O'Hare Airport, the Kennedy Expressway from O'Hare to the Chicago Loop, the Dan Ryan Expressway from the Loop to the Chicago Skyway, and the 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 the Skyway Concession Company (SCC), respectively. The remainder of the highway is maintained by the Illinois Department of Transportation (IDOT).
- ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved September 18, 2022.