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)
No driver of a vehicle shall disobey the instructions of any official traffic-control device placed in accordance with the provisions of this chapter unless at the time otherwise directed by a police officer.
(2003 Code, sec. 13.42)
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 an official sign 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 even though no signs are erected or in place.
(2003 Code, sec. 13.43)
The city manager or his designee, except as otherwise directed by this article and except as otherwise directed from time to time by the city council, shall have power and he is hereby authorized to regulate the operation and parking of vehicles within the corporate limits of the city, including private property used for public purposes, by the erection or placing of proper signs or markers indicating prohibited or limited parking, restricted speed areas, one-way streets, through or arterial streets, stop streets, prohibited or restricted turns, play streets, school zones, hospital zones, quiet zones, safety zones, loading and unloading zones, or angle parking, and other signs or markers indicating the place and manner of operating or parking vehicles. The city manager or his designee shall also have the power and is hereby authorized to regulate the movement of pedestrians upon the streets and sidewalks of the city by the erection or placing of proper signs or markers indicating the flow of pedestrian traffic. The city manager or his designee shall also have the power and he is hereby authorized to designate bus stops and taxicabs stands and to erect signs prohibiting the parking of vehicles other than buses and taxicabs in such stands. The city manager or his designee shall also have the power and he is hereby authorized to designate truck routes and to regulate the parking of vehicles of various sizes and weights. The city manager or his designee shall further have power and he is hereby authorized to cause all such necessary signs or markers to be erected or placed on any street or part of a street when he deems such action necessary.
(2003 Code, sec. 13.44)
The city manager or his designee is empowered and authorized to mark off traffic lanes on streets and parts of streets indicating and directing the flow of traffic when in his judgment such action is necessary.
(2003 Code, sec. 13.45)
(a) 
No person shall place, maintain or display upon or in view of any highway any unauthorized sign, signal, marking 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 an official traffic-control device or any railroad sign or signal.
(b) 
This section shall not be deemed to prohibit the erection upon private property adjacent to highways of signs giving useful directional information and of a type that cannot be mistaken for official signs.
(c) 
Every such prohibited sign, signal, light 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 removed without notice.
(2003 Code, sec. 13.46)
The existence of traffic signs or markers at any place within the corporate limits of the city shall be prima facie evidence that such signs or markers were erected or placed by and at the direction of the city manager or his designee and in accordance with the provisions of this chapter.
(2003 Code, sec. 13.47)
Any person failing or refusing to comply with the directions indicated on any sign or marker erected or placed in accordance with the provisions of this chapter, when so placed or erected, shall be guilty of a class C misdemeanor, and shall be subject to punishment as provided in section 1.01.009 of this code.
(2003 Code, sec. 13.48)