Northwest Tollway

Interstate 90
Route information
Maintained by ISTHA, IDOT, and SCC
Length:	107.82 mi (173.52 km)
Major junctions
West end:	I-39 / I-90 at Wisconsin state line
	I-39 / US 51 in Rockford I-290 / IL 53 in Rolling Meadows I-294 in Rosemont I-190 in Chicago I-94 in Chicago I-290 / IL 110 (CKC) in Chicago I-55 in Chicago I-94 / Chicago Skyway in Chicago
East end:	I-90 / Indiana Toll Road at Indiana state line
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate U.S. State Tollways ← IL 89 IL 90 →

Chicago Skyway
Location:	Chicago
Length:	7.49 mi (12.05 km)
Existed:	April 1958 (1958-04)–present

Interstate 90 (I-90) in the U.S. 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 108 miles (174 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 from South Beloit to O'Hare Airport, the Kennedy Expressway runs 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 (ISHTA) and Skyway Concession Company (SCC), respectively. The remainder of the highway is maintained by the Illinois Department of Transportation (IDOT).

The Chicago Skyway, also known as Chicago Skyway Toll Bridge System, is a 7.8-mile-long (12.6 km) toll road in Chicago carrying I-90 from the Indiana Toll Road to the Dan Ryan Expressway on Chicago's South Side. The main feature of the Skyway is a ¹⁄₂-mile-long (0.80 km) steel truss bridge, known as the "High Bridge". The toll bridge spans the Calumet River and Calumet Harbor, a major harbor for industrial ships. The main span is 650 feet (200 m) long, provides for 125 feet (38 m) of vertical clearance, and is the highest road in Chicago.

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Wikipedia