W. Va. Code § 17-4-45
In connection with the development of any controlled-access facility the state road commissioner 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, and to exercise jurisdiction over said local service roads as a part of the state road system, in the same manner as is authorized over controlled-access facilities under the terms of this article, 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 all devices designated as necessary or desirable by the commissioner.
W. Va. Code § 17-4-45