Section 31-5-406 - Display of unauthorized signs; advertising on traffic signs(a) 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 an imitation of or resembles an official traffic-control device or railroad sign or signal, or which attempts to direct the movement of traffic, or which hides from view or interferes with the effectiveness of any official traffic-control device or any railroad sign or signal.(b) No person shall place or maintain nor shall any public authority permit upon any highway any official traffic-control device bearing thereon any commercial advertising except for business signs included as a part of official motorist service panels or roadside information panels approved by the highway department.(c) This section does not prohibit the erection upon private property adjacent to highways of signs giving useful directional information and of a type that cannot be mistaken for official signs.(d) Every prohibited sign, signal or marking is a public nuisance and the authority having jurisdiction over the highway may remove the same or cause it to be removed without notice.