24-2-1 OBEDIENCE TO POLICE. Members of the Sheriff’s Department, Special Deputies, and Auxiliary Deputies assigned to traffic duty are hereby authorized to direct all traffic in accordance with the provisions of this Code or in emergencies as public safety or convenience may require, and it shall be unlawful for any person to fail or refuse to comply with any lawful order, signal or direction of a policeman. Except in cases of emergency, it shall be unlawful for any person not authorized by law to direct traffic. (See 625 ILCS Sec. 5/11-203)
24-2-2 SCENE OF FIRE. The Fire Department officer in command or any fireman designated by him may exercise the powers and authority of a policeman in directing traffic at the scene of any fire or where the Fire Department has responded to an emergency call for so long as the Fire Department equipment is on the scene in the absence of or in assisting the Sheriff’s Department.
24-2-3 SIGNS AND SIGNALS. It shall be unlawful for the driver of any vehicle to disobey the instructions of any traffic sign or signal placed in view by authority of the County or in accordance with the laws of the State of Illinois except upon direction of a police officer or Sheriff’s deputy. All signs and signals established by direction of the governing body shall conform to the Illinois State Manual of Uniform Traffic Control Devices for Streets and Highways. (See 625 ILCS 5/11-301)
24-2-4 UNAUTHORIZED SIGNS. No person shall place, maintain or display upon or in view of any street, any unauthorized sign, signal, marking, light, reflector or device which purports to be or is an imitation of or resembles an official traffic-control device or railroad sign or signal, or which attempts to direct the movement of traffic, nor shall any person place, maintain or display upon or in view of any street, any other sign which hides from view or interferes with the movement of traffic or effectiveness of any traffic-control device or any railroad sign or signal, and no person shall place or maintain, nor shall any public authority permit upon any highway, any traffic sign or signal bearing thereon any commercial advertising. No tree, bush or foliage of any kind shall be so placed, maintained, allowed to remain, or be displayed upon either public or private property in such a manner as to hide from view or interfere with the movement of traffic or the effectiveness of any traffic-control device, sign or signal. (See 625 ILCS 5/11-310)
24-2-5 INTERFERENCE WITH SIGNS OR SIGNALS. It shall be unlawful for any person to deface, injure, move or interfere with any official traffic sign or signal. (See 625 ILCS 5/11-311)
24-2-6 ADVERTISING SIGNS. It shall be unlawful to maintain anywhere in the County any sign, signal, marking or device other than a traffic sign or signal authorized by the County Board or the Illinois Department of Transportation, which purports to be or is an imitation of or resembles an official traffic-control device or railroad sign or signal in view of any street or highway, and it shall be unlawful to place or maintain any sign which hides from view any lawful traffic-control device. It shall be unlawful to maintain or operate any flashing or rotating beacon of light in view of any street or highway.