(a) The commission may screen with appropriate means, including natural objects, plantings, or fences, a lawfully existing junkyard that is within 1,000 feet of the nearest edge of a right-of-way of a highway in the interstate or primary system.
(b) The commission may acquire an area outside of a highway right-of-way so that a junkyard may be screened from the main-traveled way of a highway in the interstate or primary system.