N.C. Gen. Stat. § 160A-305

Any city is hereby authorized to enter into agreements with the State of North Carolina and its agencies, and with the federal government and its agencies, to secure the full benefits available to the city under the National Highway Safety Act of 1966, and to cooperate with State and federal agencies, other public and private agencies, interested organizations, and individuals, to effectuate the purposes of the act and subsequent amendments thereof.