(a) Procedure.--The board may investigate all means of transportation and the management thereof, the enforcement of its resolutions, rules and regulations, and the action, conduct, and efficiency of all officers, agents and employees of the authority. In the conduct of investigations, the board may hold public hearings on its own motion and shall do so on complaint or petition of any municipality in the metropolitan area. Each member of the board shall have power to administer oaths, and the secretary, by order of the board, shall issue subpoenas to secure the attendance and testimony of witnesses and the production of books and papers relevant to investigations and to any hearing before the board or any member thereof, or any officers' committee or employees' committee, appointed by the board to hear any complaint of an officer or employee who has been discharged or demoted.

(b) Enforcement.--Any court of record of this Commonwealth, or any judge thereof, either in term time or vacation, upon application of the board or any member thereof, may, in his discretion, compel the attendance of witnesses, the production of books and papers and giving of testimony before the board or before any member thereof, or any officers' committee or employees' committee appointed by the board by attachment for contempt or otherwise, in the same manner as the production of evidence may be compelled before the court.