Section 346.41 - Display of unauthorized signs and signals prohibited(1) No person shall place, maintain, or display upon or in view of any highway or at or in view of any railroad crossing any unauthorized sign, light, reflector, signal, pavement marking, or device which: (a) Purports to be or is an imitation of or resembles or may be mistaken for an official traffic sign or signal or railroad sign or signal; or(b) Attempts to direct the movement of traffic; or(c) Hides from view or by its color, location, brilliance or manner of operation interferes with the effectiveness of any official traffic sign or signal or railroad sign or signal.(2) No person may place or maintain, and no public authority may permit upon any highway, any traffic control device bearing any advertising, except that a federal or fluorescent yellow flag, not less than 20 inches nor more than 24 inches square and bearing either the words "Safety Patrol" or "School," attached to a light weight pole 8 feet or less in length may be used by members of school safety patrols standing adjacent to but off the roadway to warn traffic that children are about to cross the roadway.(3) No person shall place or maintain, or allow to be displayed any red or amber reflector within the limits of the highway boundaries at or near the entrance to a private road or driveway. The use of blue reflectors is permitted provided there is no disapproval by the highway authority in charge of maintenance of the highway.Amended by Acts 2015 ch, 124,s 14, eff. 12/18/2015.