The Authority shall install and maintain automated traffic safety systems along traffic routes within a one-half mile radius of: (1) the eastern entrance to O'Hare International Airport; and (2) the intersection of Interstate 90 and Interstate 294.
A traffic route that is equipped with an automated traffic safety system must be posted with signs visible to approaching traffic indicating that the route is being monitored by an automated traffic safety system and informing drivers that stopping or standing is prohibited.
625 ILCS 80/15