§ 17-5.  Traffic-control devices.
   (a)   The city manager shall cause to be directed and maintained traffic control signs, signals and devices when and as required under this chapter and any traffic ordinances of this city to make effective the provisions of this chapter and such ordinances, and may place and maintain such additional traffic-control devices as he may deem necessary to regulate traffic under this chapter or under state law or to guide or warn traffic.
   (b)   All traffic-control signs, signals and devices existing on the effective date of this Code are hereby ratified and approved and shall be considered as having been lawfully installed.
(Code 1977, §§ 50.030(4), 50.060(1)(a))