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 manual and specifications for a uniform system of traffic-control devices promulgated by the state transportation commission pursuant to Tex. Transportation Code, section 544.001. All signs, signals and markings erected or used by the city shall be uniform and be located so far as practicable according to the directions shown in the manual throughout the city. All existing traffic-control devices and those erected in the future by the city being consistent with the manual, state law and this section shall be official traffic-control devices.
(2002 Code, sec. 70.01(A))
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 and any ordinance directing that the traffic-control device, sign or signal shall be installed or erected, unless otherwise directed by a police officer, subject to the exceptions granted the driver of an authorized emergency vehicle permitted by this chapter.
(2002 Code, sec. 70.01(B))
(a) 
No person shall place, maintain or display upon or in view of any highway, street or alley any unauthorized sign, signal, marking or device which purports to be, is an imitation of or resembles an official traffic-control device or railroad sign or signal, which attempts to direct the movement of traffic, or which hides from view or interferes with the effectiveness of any official control device or 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 prohibited sign, signal or markings 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 removed without notice.
(2002 Code, sec. 70.01(D))
(a) 
The city council shall, by ordinance, direct that the city manager shall have the duty of erecting or installing upon, over, along or beside any highway, street or alley signs, signals and markings, or causing the same to be erected, installed or placed, in accordance with this article and consistent with the manual. The traffic-control devices shall be installed immediately, or as soon as the specific device, sign or signal can be procured.
(b) 
Whenever the city manager 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 or her direction, in obedience to this article, the manual or another ordinance directing the erection of the device, signal or sign, he shall thereafter file a report with the city secretary in writing and signed officially by the city manager, stating the type of traffic-control device, sign or signal, and when and where the same was erected or installed. The city secretary shall file and maintain the report of the city manager among the official papers of the office of the city secretary.
(2002 Code, sec. 70.01(E))
It shall be unlawful for any person other than the city manager, 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 chapter, 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 city manager pursuant to the authority of this article and of the ordinance directing the installation of the device, signal or marking.
(2002 Code, sec. 70.01(G))