(1) "Information center" means an area or site established, operated, and maintained at a safety rest area for the purpose of informing the public of places of interest within the State of Arkansas and providing such other information as the State Highway Commission may deem desirable;

(2) "Interstate system" or "interstate" means that portion of the National System of Interstate and Defense Highways located within this state, as officially designated or as may hereafter be designated by the commission and approved by the United States Secretary of Transportation, pursuant to the provisions of Title 23 of the United States Code;

(3) "Motorist services directional sign" means a sign giving directional information about goods and services in the interest of the traveling public, including, but not limited to:

(A) Places of public lodging;

(B) Places where food is served to the public on a regular basis;

(C) Places where automotive fuel or emergency automotive repair services, including truck stops, are regularly available to the public;

(D) Educational institutions;

(E) Places of religious worship;

(F) Public or private recreation areas, including campgrounds, resorts, and attractions, natural wonders, wildlife and waterfowl refuges, and nature trails;

(G) Plays, concerts, and fairs;

(H) Antique shops; and

(I) Agricultural products in a natural state, including vegetables and fruit;

(4) "Outdoor advertising" means any outdoor sign, display, device, figures, painting, drawing, message, plaque, poster, billboard, or other thing which is designed, intended, or used to advertise or inform, any part of the advertising or informational contents of which is visible from any place on the main-traveled way of the interstate or primary highways;

(5) "Primary system" or "primary" means that portion of the federal-aid primary system located within this state, as officially designated or as may hereafter be designated by the commission and approved by the United States Secretary of Transportation, pursuant to the provisions of Title 23 of the United States Code;

(6) "Safety rest area" means an area or site established, operated, and maintained within or adjacent to the right-of-way by or under public supervision or control, for the convenience of the traveling public; and

(7) "Scenic byway" means a highway, or a portion of a highway, that has been designated a scenic byway by the commission in accordance with federal laws, regulations, and rules pertaining to scenic byways.