The City Traffic Engineer shall place and maintain traffic control signs, signals and devices when and as required under the traffic ordinances of the City to make effective the provisions of said ordinances and may place and maintain such additional traffic control devices as he/she may deem necessary to regulate traffic under the traffic ordinances of the City or under State law or to guide or warn traffic.
All traffic control signs, signals and devices shall conform to the manual and specifications approved by the State Highways and Transportation Commission or resolution adopted by the Board of Aldermen of the City. All signs or signals required hereunder for a particular purpose shall so far as practicable be uniform as to type and location throughout the City. All traffic control devices so erected and not inconsistent with the provisions of this Title shall be official traffic control devices.
The driver of any vehicle shall obey the instructions of any official traffic control device applicable thereto placed in accordance with the provisions of this Title, unless otherwise directed by a traffic or Police Officer, subject to the exceptions granted the driver of an authorized emergency vehicle in this Title.
No provision of this Title for which official traffic control devices are required shall be enforced against an alleged violator if at the time and place of the alleged violation an official device is not in proper position and sufficiently legible to be seen by an ordinarily observant person. Whenever a particular Section does not state that official traffic control devices are required, such Section shall be effective even though no devices are erected or in place.
When lane direction control signals are placed over the individual lanes of a street or highway, vehicular traffic may travel in any lane over which a green signal is shown but shall not enter or travel in any lane over which a red signal is shown.
No person shall place, maintain or display upon or in view of any highway an 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 any official traffic control device or any railroad sign or signal.
No person shall without lawful authority attempt to or in fact alter, deface, injure, knock down or remove any official traffic control device or any railroad sign or signal or any inscription, shield or insignia thereon or any other part thereof.
The City Traffic Engineer shall have authority to declare any street or part thereof a play street and to place appropriate signs or devices in the roadway indicating and helping to protect the same.
Whenever authorized signs are erected indicating any street or part thereof as a play street, no person shall drive a vehicle upon any such street or portion thereof except drivers of vehicles having business or whose residences are within such closed area, and then any said driver shall exercise the greatest care in driving upon any such street or portion thereof.