A.   It shall be the duty of the traffic division, assisted by other police officers of the department, to investigate traffic accidents, to arrest and to assist in the prosecution of those persons charged with violations of law causing or contributing to such accidents.
   B.   Whenever the accidents at any particular location become numerous, the traffic division shall conduct studies of such accidents and determine remedial measures. (1990 Code § 10.04.030)
   C.   The traffic division shall maintain a suitable system of filing traffic accident reports. Accident reports or cards referring to them shall be filed chronologically. Such reports shall be available for the use and information of the city traffic engineer. (1990 Code § 10.04.030; amd. 2003 Code)