N.D. Cent. Code § 24-01-35
In connection with the development of any controlled-access facility the state, county, or municipal highway authorities are 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 service roads in the same manner as is authorized over controlled-access facilities, if, in their opinion, such local service roads and streets are necessary or desirable. Such local service roads or streets must be of appropriate design and must be separated from the controlled-access facility proper by means of all devices designated as necessary or desirable by the proper authority.
N.D.C.C. § 24-01-35