N.C. Gen. Stat. § 62-41
The Commission may conduct a program of accident prevention and public safety covering all public utilities with special emphasis on highway safety and transport safety and may investigate the causes of any accident on a highway involving a public utility. Any information obtained upon such investigation shall be reduced to writing and a report thereof filed in the office of the Commission, which shall be subject to public inspection but such report shall not be admissible in evidence in any civil or criminal proceeding arising from such accident. The Commission may adopt reasonable rules and regulations for the safety of the public as affected by public utilities and the safety of public utility employees. The Commission shall cooperate with and coordinate its activities for public utilities with similar programs of the Division of Motor Vehicles, the Insurance Department, the Industrial Commission and other organizations engaged in the promotion of highway safety and employee safety.
N.C. Gen. Stat. § 62-41