The department is authorized to acquire by purchase, lease, condemnation, gift, devise, bequest, grant, or exchange, title to or any interests or rights in real property adjacent to state highways for the preservation of natural beauty, historic sites or viewpoints or for safety rest areas or to provide a visual or sound buffer between highways and adjacent properties. However, the department shall not acquire, by condemnation, less than an owner's entire interest for providing a visual or sound buffer between highways and adjacent properties under RCW
47.12.010 and
47.12.250 if the owner objects to the taking of a lesser interest or right.