(a)   The City Manager or the Chief of Police may at any time detail officers at street intersections. Such officers, to be known as traffic officers, shall be vested with authority to regulate and control traffic at the intersections at which they are detailed. It shall be their duty to direct the movement of traffic at such intersections in such manner as will facilitate traffic and prevent congestion and accidents.
   (b)   No person shall violate any order or signal of any such traffic officer, notwithstanding any stop sign or other device that may have been placed at any such intersection.
(1958 Code § 16.4)