36 Pa. Stat. § 670-1006
The Secretary of Transportation may perform such highway construction for improvements of streets in cities, boroughs, incorporated towns and townships which directly facilitate and control traffic flow, such as grade separation of intersections, widening of lanes, channelization of traffic, traffic control systems, and loading and unloading ramps in accordance with the provisions of section 10 of the Federal-Aid Highway Act of 1968 (Chapter 1, Title 23 U.S.C.).
The secretary shall enter into all necessary contracts and agreements with the proper agencies of any government, Federal, State and/or political subdivisions and shall do all other things necessary and proper in order to obtain the benefits afforded under section 10 of the Federal-Aid Highway Act of 1968.
36 P.S. § 670-1006