 It was planned as being approximately in length, mostly in Illinois, connecting Interstate 55 (I-55) in Illinois to I-65 in Indiana.The proposed route of the Illiana Expressway extends from Interstate 55 in Illinois to Interstate 65 in Indiana, passing just south of the Joliet Army Ammunition Plant.The vision of the Illiana Corridor dates back to the 1909 Plan of Chicago by Daniel Burnham and Edward Bennett that included an "Outer Encircling Highway" serving northeastern Illinois and northwest Indiana.