Any junkyard or scrap processing facility lawfully in existence on the effective date of this Act which is within 1,000 feet of the nearest edge of the right of way and visible from the main-traveled way of any highway on the Federal-Aid Interstate or Federal-Aid Primary Systems, shall be screened, if feasible, by the Department at locations on highway right of way or in areas acquired for such purposes outside the right of way so as not to be visible from the main-traveled way of such highway.