No provision of this chapter for which signs are required shall be enforced against an alleged violator if, at the time and place of the alleged violation, any traffic-control sign or signal herein required is not in proper position and sufficiently legible to be seen by an ordinarily observant person. Whenever a particular section does not state that signs are required, such section shall be effective without signs being erected to give notice thereof.
(Ordinance 33 adopted)
All traffic-control devices including signs, signals and markings (pavement and/or curb) installed or used for the purpose of directing and controlling traffic within the city shall conform with the state manual and specifications adopted by the state traffic commission. All signs, signals and markings erected or used by the city shall be uniform and shall be located so far as practicable according to the directions shown in the state manual and specifications throughout the city. All existing traffic-control devices and those erected in the future by the city being consistent with the state manual and specifications, state law and this article shall be official traffic-control devices.
(Ordinance 8-78 adopted 8/14/78)
The driver of any vehicle, motor vehicle or animal shall obey the instructions of any official traffic-control device, sign, signal or marking applicable thereto placed in accordance with this article, unless otherwise directed by a police officer, subject to the exceptions granted the driver of an authorized emergency vehicle.
(Ordinance 8-78 adopted 8/14/78)
(a) 
No person shall place, maintain, or display upon or in view of any highway, street or alley any unauthorized sign, signal, 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 or which hides from view or interferes with the effectiveness of any official control device or any railroad sign or signal.
(b) 
No person shall place or maintain nor shall any public authority permit upon any highway, street or alley any traffic sign or signal bearing thereon any commercial advertising.
(c) 
This section shall not be deemed to prohibit the erection upon private property adjacent to highways, streets or alleys of signs giving useful directional information and of a type that cannot be mistaken for official signs.
(d) 
Every such prohibited sign, signal or marking is hereby declared to be a public nuisance, and the chief of police is hereby empowered to remove the same or cause it to be moved without notice.
(Ordinance 8-78 adopted 8/14/78)
No person shall without lawful authority attempt to or in fact alter, deface, injure, knock down or remove any official traffic-control device, sign or signal or any railroad sign or signal or any inscription, shield, or insignia thereon, or any part thereof.
(Ordinance 8-78 adopted 8/14/78)
(a) 
The city council shall by ordinance direct that the director of public works shall have the authority of erecting or installing upon, over, along, or beside any highway, street or alley signs, signals and markings or cause the same to be erected, installed or placed in accordance with this article and consistent with the state manual and specifications. Said traffic-control devices shall be installed immediately, or as soon as such specific device, sign or signal can be procured.
(b) 
Whenever the director of public works has erected and installed any official traffic-control device, signal or sign at any location in the city or has caused the same to be done under his direction, in obedience to this article and the state manual and specifications, the director shall thereafter file a report with the city secretary in writing and signed officially by the director of public works, stating the type of traffic-control device, sign or signal, and when and where the same was erected and installed. The city secretary shall file and maintain such report of the director of public works among the official papers of the office of the city secretary.
(Ordinance 8-78 adopted 8/14/78)
It being unlawful for any person other than the director of public works, acting pursuant to an ordinance of the city, to install or cause to be installed any signal, sign or device purporting to direct the use of the streets or the activities on those streets of pedestrians, vehicles, motor vehicles, or animals, proof, in any prosecution for a violation of this article or any traffic ordinance of the city, that any traffic-control device, sign, signal or marking was actually in place on any street shall constitute prima facie evidence that the same was installed by the director of public works pursuant to the authority of this article and of the ordinance directing the installation of such device, signal or marking.
(Ordinance 8-78 adopted 8/14/78)
Any person convicted of violating any of the provisions of this article shall be punished by a fine in accordance with the general penalty provision found in section 1.01.009.
(Ordinance 8-78 adopted 8/14/78)