That certain code in book form known as "Traffic Rules And Regulations" compiled by the state department of public safety, and as amended or superseded from time to time is hereby adopted. All laws, rules and regulations continued therein where applicable shall be in full force and effect within the city. Not less than three (3) copies of said book shall remain on file in the office of the city recorder. (1989 Code § 7-1-1, 9-20-1988; amd. 1997 Code)