53 Pa. Stat. § 30653
The City Planning Commission may make, or cause to be made, and lay before councils, and in its discretion cause to be published, a map or maps of the city, or any portion or portions thereof, including territory extending three miles beyond the city limits, showing the streets and highways and other natural or artificial features; and also locations proposed by it for any new public buildings, civic center, street, parkway, boulevard, park, playground, or any other public ground or public improvement; or any widening, extension or relocation of the same, or any change in the city plan, by it deemed advisable. And it may make recommendations to councils, from time to time, concerning any such matters and things aforesaid for action by councils thereon; and, in so doing, have regard for the present conditions and future needs and growth of the city, and the distribution and relative location of all the principal and other streets and railways, waterways and all other means of public travel and business communications, as well as the distribution and relative location of all public buildings, public grounds and open spaces devoted to public use, and the planning and laying out for urban uses of private grounds brought into the market from time to time.
53 P.S. § 30653