The establishment of a limited access highway or a local service highway by the Secretary of Highways, as herein provided, shall be by a plan approved by the Governor and filed in the office of the recorder of deeds of the proper county, at the expense of the Commonwealth. The establishment of a limited access highway or a local service highway by the authorities of any political subdivision of the Commonwealth, as herein provided shall be in the same manner as now or hereafter provided by law for the opening, widening or relocating of highways by such political subdivision.
36 P.S. § 2391.6