It shall be the duty of the police department to enforce the traffic regulations of this city and all of the state vehicle laws applicable to traffic in this city, to make arrests for traffic violations, to investigate traffic accidents and to cooperate with the city traffic engineer and other officials of the city in the administration of the traffic laws and in developing ways and means to improve traffic conditions, and to carry out those duties specially imposed upon such department by this chapter and other ordinances of this city.
(Ord. No. 364, § 2)