18 Pa. C.S. § 2707 : Consolidated Statutes — CRIMES AND OFFENSES — DEFINITION OF SPECIFIC OFFENSES — OFFENSES INVOLVING DANGER TO THE PERSON — ASSAULT — Propulsion of missiles into an occupied vehicle or onto a roadway
(a) Occupied vehicles.--Whoever intentionally throws, shoots or propels a rock, stone, brick, or piece of iron, steel or other like metal, or any deadly or dangerous missile, or fire bomb, into a vehicle or instrumentality of public transportation that is occupied by one or more persons commits a misdemeanor of the first degree.
(b) Roadways.--Whoever intentionally throws, shoots, drops or causes to be propelled any solid object, from an overpass or any other location adjacent to or on a roadway, onto or toward said roadway shall be guilty of a misdemeanor of the second degree.