It shall be the duty of the Traffic Division, with such aid as may be rendered by 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 officers of the City in the administration of traffic laws and in developing ways and means to improve traffic conditions, and to carry out those duties specially imposed upon such Division by this Title and the traffic ordinances of the City. (1972 Code § 70.015)