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 adopted by the state transportation commission as provided in V.T.C.A., Transportation Code, section 544.001. All signs, signals and markings erected or used by the city must conform to the manual and specifications adopted under V.T.C.A., Transportation Code, section 544.001. All existing traffic-control devices and those erected in the future by the city being consistent with the manual and specifications, state law and this section shall be official traffic-control devices.
(Ordinance adopting Code)
The driver of any vehicle, motor vehicle or animal shall obey the instructions of any official traffic-control device, sign, signal or marking 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 permitted by this chapter.
(1993 Code, sec. 6-2-2)
(a) 
The city superintendent shall have the duty 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 manual. Said traffic-control devices shall be installed immediately or as soon as such specific device, sign or signal can be procured.
(b) 
Whenever the city superintendent 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, he shall file a report with the city secretary, in writing, 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 among the official papers of the city.
(c) 
It being unlawful for any person, other than the city superintendent, 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, in that event, any traffic-control device, sign, signal or marking actually in place on any street shall constitute prima facie evidence that the same was installed by the city superintendent pursuant to the authority of this article and of the ordinance directing the installation of such device, signal or marking.
(1993 Code, sec. 6-2-3)