Streets and Highways Code § 749
ARTICLE 5. Control of Junkyards, Scrap Metal Processing Facilities, and Automobile Dismantling Facilities
The department may also screen any junkyards located within 1,000 feet of the nearest edge of the right-of-way of an interstate or primary highway and located within an industrial zone if the director finds that such screening is necessary or desirable to achieve the purposes set forth in subdivision (a) of Section 745.