53 Pa. Stat. § 1724
Hereafter, in the construction or repair of any highway, it shall be unlawful for the person or persons in charge of such construction or repair, to raise such highway, or permit the same to be raised or elevated, above the ordinary grade thereof, when a drain or culvert shall be constructed under such highway, or when such highway shall be constructed or repaired over such drain or culvert; Provided, however, That this act shall not be construed, in any manner, to interfere with the work of the State Highway Department in the reconstruction or improvement of any State Highway or State-aid highway, or when a township or townships may be improving a township road under the direction, plans, and specifications of the State Highway Department.
53 P.S. § 1724