92 Ill. Adm. Code 2520.278
Traffic Control Devices
Section 2520
Section 2520.278 Traffic
Control Devices
a) All persons driving vehicles upon the Tollway are required to
obey all traffic control devices on the Tollway, unless otherwise directed by a
member of the State Police, Authority employees or agents, or emergency service
providers.
b) The Engineering Department of the Authority shall have the
power to establish specifications for traffic control devices on the Tollway;
provided, however, that unless the Authority or its Engineering Department has
established contrary specifications, the current Department of Transportation
specifications for traffic control devices shall apply.