Section 28-648 - Display of unauthorized signs, signals or markingsA. A person shall not place, maintain or display on or in view of a highway an unauthorized sign, signal, marking or device that either:1. Purports to be or is an imitation of or resembles an official traffic control device or railroad sign or signal.2. Attempts to direct the movement of traffic.3. Hides from view or interferes with the effectiveness of an official traffic control device or a railroad sign or signal.B. A person shall not place or maintain and a public authority shall not permit on a highway a traffic sign or signal bearing any commercial advertising.C. This section does not prohibit the erection on private property adjacent to highways of a sign giving useful directional information if the sign cannot be mistaken for an official sign.D. A sign, signal or marking prohibited by this section is a public nuisance, and the authority having jurisdiction over the highway may remove it or cause it to be removed without notice.