The City Council or the city police may at any time detail officers, to be known as “traffic officers,” at street intersections. All traffic officers shall be vested with the authority to regulate and control traffic at the intersections to which they are assigned. It shall be their duty to direct the movement of traffic and prevent congestion and accidents. It shall be unlawful for any person to violate any order or signal of any such traffic officer notwithstanding the directive of a stop sign or signal device that may have been placed at any such intersection.
Penalty, see § 70.99