36 Pa. Stat. § 670-601
The department, with the approval of the Governor, may build, rebuild, construct and maintain roads, bridges and viaducts within or on any State forest lands; or within or on the lands of any charitable, penal or educational institution, including The Pennsylvania State College; or within or on the lands of State parks, State armories and military reservations or within or on any lands owned by the Commonwealth or under the direct control of any administrative department, board or commission of the State government.
Nothing in this section shall be construed as relieving any political subdivision of the Commonwealth from any responsibility for the construction, reconstruction, maintenance, repair, policing and supervision of any road, bridge or viaduct, except as such responsibility may be assumed by the Commonwealth under the provisions of this section or future laws applicable thereto.
36 P.S. § 670-601