(a) It shall be unlawful for any person to drive a motor vehicle in excess of 20 miles per hour in any school zone marked by effective times or flashing yellow lights as provided in TMC 10.20.140 and 10.20.150.

(b) The effective times of day for each school zone shall be established by the Traffic Operations Division in conjunction with the school authorities of the affected schools. The Traffic Operations Division shall maintain a public record of the established effective times for each school zone.

(c) It is permissible for the effective times of day and durations of school zones servicing any public or private elementary or middle school to vary from the effective times and durations of any or all other school zones within the City, as deemed necessary by the Transportation Operations Division. The fact that the effective times and durations of a school zone vary from others within the City shall not constitute a defense to a traffic charge of exceeding that posted school zone speed limit. (Ord. 17815 § 4, 4-9-02; Ord. 17190 § 2, 10-21-97. Code 1981 § 43-327. Code 1995 § 142-214.)