Runs north-south through the Northern Suburbs of Chicago. Runs north-south through the Northern Suburbs of Chicago. Runs east-west across Northern Illinois. Runs east-west across Central Illinois. Runs east-west across Northern Illinois. Runs east-west across Central and Northern Illinois. Runs east-west across Central Illinois. Runs east-west across Southern Illinois. Runs north-south through Northeastern Illinois. Runs north-south through Northeastern and portions of Central Illinois. Runs east-west through Southern Illinois. Runs north-south for the lenght of the state in the center. Runs east-west across Northern Illinois. Runs north-south in Pike County. Runs in Alexander County. Runs in Alexander County. Runs north-south through Western Illinois.