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 through a variety of settings, from farmland west of the
Fox River Valley through the medium-density suburban west of
O'Hare International Airport, through downtown Chicago, and through the heart of the industrial southeast side of Chicago before entering Indiana.