Section 810.230 - Unlawful sign display; exceptions; penalty(1) A person commits the offense of unlawful sign display if the person does any of the following: (a) Without authority under ORS 810.200 or 810.210, places, maintains or displays upon or in view of any highway any sign, signal, marking or device that:(A) Purports to be or is an imitation or resembles an official traffic control device or railroad sign or signal;(B) Attempts to direct the movement of animal, pedestrian, vehicle or any other traffic; or(C) Hides from view or interferes with the effectiveness of a traffic control device or railroad sign or signal.(b) Places or maintains upon any highway any traffic sign or signal bearing thereon any commercial advertising device.(2) This section does not prohibit the placing and maintaining of signs, markers or signals bearing thereon the name of an organization authorized to place the same by the appropriate public authority.(3) Every prohibited sign, signal, marking or device is hereby declared to be a public nuisance and the authority with jurisdiction over the highway, without notice, may remove it or cause it to be moved.(4) The offense described in this section, unlawful sign display, is a Class B traffic violation. 1983 c.338 §708; 1985 c.16 §342; 1995 c.383 §41