The courts of quarter sessions shall have power to inquire of and vacate any part or parts of any former State road or turnpike road which has been adopted as a State highway, where such part, or parts thereof, due to the change or relocation of the State highway, no longer form a part of such State highway. Such vacation shall be in the same manner as in the case of the vacation of roads under general road law.
36 P.S. § 670-215