It shall be the duty of the traffic division and other members of the police department to enforce the street traffic regulations of the city and all of the state vehicle laws applicable to street traffic in the city, to make arrests for traffic violations, to investigate accidents and to cooperate with the traffic engineer and other officers of the city in the administration of the traffic laws in developing ways and means to improve traffic conditions, and to carry out those duties specially imposed upon such division by this chapter and the traffic ordinances of the city.
(1953 Code, ch. 17, ยง 25)