(A)   It shall be the duty of officers of the Police Department, to investigate traffic accidents, and to arrest and 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, officers of the Police Department shall conduct studies of accidents and determine remedial measures.
   (C)   A suitable system of filing traffic accident reports shall be maintained.  Accident reports or cards referring to them shall be filed alphabetically by location.  The reports shall be available for the use and information of the city.  The Police Department shall receive and properly file all accident reports made to it under state law or under any ordinance of this city, but all such accident reports made by drivers shall be for the confidential use of the Police Department.  No such report shall be admissible in any civil or criminal proceeding other than on request of any person asking for the report or on request of the court having jurisdiction to prove a compliance with the laws requiring the making of all such reports.