10.08.020   Unauthorized persons shall not direct traffic.
   No person other than a member of the police department or a person assigned by the chief of police or person authorized by law shall direct or attempt to direct traffic by voice, hand or other signal, except that persons may operate when provided any mechanical pushbutton signal erected by order of the city manager.
(Ord. 1714 (part), 1956: prior code § 19.22)