N.C. Gen. Stat. § 143B-346
The general purpose of the Department of Transportation is to provide for the necessary planning, construction, maintenance, and operation of an integrated statewide transportation system for the economical and safe transportation of people and goods as provided for by law. The Department shall also provide and maintain an accurate register of transportation vehicles as provided by statutes, and the Department shall enforce the laws of this State relating to transportation safety assigned to the Department. The Department of Transportation shall be responsible for all of the transportation functions of the executive branch of the State as provided by law except those functions delegated to the Utilities Commission and the Commissioners of Navigation and Pilotage as provided for by Chapter 76. The major transportation functions include aeronautics, highways, mass transportation, motor vehicles, and transportation safety as provided for by State law. The Department of Transportation shall succeed to all functions vested in the Board of Transportation and the Department of Motor Vehicles on July 1, 1977.
N.C. Gen. Stat. § 143B-346