No person shall place, maintain or display upon or in view of any highway any unauthorized sign, signal, marking or device which purports to be or is in an imitation of or resembles an official traffic-control device or railroad sign or signal, or which attempts to direct the movement of traffic, nor shall any person place or maintain or display upon or in view of any highway any other sign which hides from view or interferes with the movement of traffic or effectiveness of any traffic-control device or any railroad sign or signal, and no person shall place or maintain nor shall any public authority permit upon any highway any traffic or signal bearing thereon any commercial advertising. (M.C. 1962, sec. 18.110)