Pennsylvania Statutes Title 36 P.S. Highways and Bridges § 961-14. Types of improvement included

The type of improvement shall include opening, widening and change of grade on any street, or section thereof, clearing, grading, demolition, removal of existing paving, repaving, surfacing, the construction of traffic islands, circle or other traffic channelizations, the construction of storm water conduits, drains and gutters, culverts, bridges, viaducts and retaining walls, curbing and recurbing, the paving and repaving of sidewalks, the planting of trees and shrubs, seeding and sodding, street and traffic signs, traffic signals and conduits and lighting fixtures for same, and such other work, excepting water pipe and sanitary sewers, as may be necessary fully and satisfactorily to complete such improvement.