(c) Property owner may remove vehicle.--The owner or other person in charge or possession of any property on which a vehicle is parked or left unattended in violation of the provisions of subsection (b) may remove or have removed the vehicle at the reasonable expense of the owner of the vehicle.  Such person who removes or has removed a vehicle left parked or unattended in violation of the provisions of subsection (b) shall have a lien against the owner of the vehicle, in the amount of the reasonable value of the costs of removing the vehicle plus the costs of storage.  Any city, borough, incorporated town or township may, by ordinance, provide for rates to be charged for removal of vehicles and for municipal regulation of authorized towing services. If storage charges are not set by the municipality, a maximum of $25 per day may be charged for storage.

https://codes.findlaw.com/pa/title-75-pacsa-vehicles/pa-csa-sect-75-3353/

"Vehicle." Every device in, upon or by which any person or property is or may be transported or drawn upon a highway, except devices used exclusively upon rails or tracks. The term does not include a self-propelled wheelchair or an electrical mobility device operated by and designed for the exclusive use of a person with a mobility-related disability.

"Highway." The entire width between the boundary lines of every way publicly maintained when any part thereof is open to the use of the public for purposes of vehicular travel. The term includes a roadway open to the use of the public for vehicular travel on grounds of a college or university or public or private school or public or historical park.

"Sidewalk." That portion of a street between curb lines, or the lateral lines of a roadway, and the adjacent property lines, intended for use by pedestrians.

https://www.legis.state.pa.us/cfdocs/legis/LI/consCheck.cfm?txtType=HTM&ttl=75&div=0&chpt=1&sctn=2&subsctn=0

https://pittsburghpa.gov/pli/towing-license

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