Ewing Avenue S. South Shore Drive S. Indianapolis Avenue Expressways The city of Chicago proper contains seven major Interstate highways. U.S. Routes County roads Cook County has a modest amount of county roads after plans were made in 2009 to designate many roads on county ownership as a public service. Only the designated streets in the townships of Lemont, Palos, Orland, Bremen, Lyons (south of the rivers) and Wheeling have the blue pentagon signs that are used to demarcate county roads. Gallery See also Chicago Department of Transportation Chicago Pedway Chicago Tunnel Company Cycling in Chicago Horatio G. Loomis LaSalle Street Tunnel Matthew Laflin Philip Maxwell Philo Carpenter Van Buren Street Tunnel Washington Street Tunnel (Chicago) References External links Architecture and Building History resources, Chicago History Museum Chicago-related lists Transportation in Chicago Chicago