The Traffic Engineer shall study the cases of all the drivers charged with serious violations of the traffic laws or involved in frequent traffic accidents or any serious accident, and shall attempt to discover the reasons therefor, and shall take whatever steps are lawful and reasonable to prevent a reoccurrence of the same. (Ord. 17620 § 6, 12-12-00. Code 1981 § 43-23. Code 1995 § 142-40.)