The Legislature hereby finds and declares that the erection and maintenance of outdoor advertising signs, displays and devices in areas adjacent to state controlled routes should be controlled in order to protect the public investment in such highways, to promote the safety and recreational value of public travel, and to preserve natural beauty. Any advertising device subject to Sections 49-23-1 through 49-23-29, and found to be in violation thereof, is subject to removal under the state's police power where not contrary to provisions provided herein. It is the intention of the Legislature in such sections to provide a statutory basis for regulation of outdoor advertising consistent with the public policy declared by Congress in areas adjacent to state controlled routes.