In connection with the development of any controlled access facility, the Director of Transportation is authorized to plan, designate, establish, use, regulate, alter, improve, maintain, and vacate local service roads and streets or to designate as local service roads and streets any existing road or street if, in his opinion, such local service roads and streets are necessary or desirable. Such local service roads or streets shall be of appropriate design and shall be separated from the controlled access facility proper by means of all devices designated as necessary or desirable by the proper authority.