It shall be unlawful for any person to place, maintain, or display any device, other than an official warning or direction sign or signal authorized by statute or ordinance, upon or in view of any street, if the device purports to be, or is in imitation of, an official warning or direction sign or signal, or directs or purports to direct the movement of traffic. Any unauthorized device is declared to be a nuisance, and may be removed by any policeman.
('77 Code, § 70.011(A)) (Ord. passed 8-18-58) Penalty, see § 70.99