The term 'Passenger Vehicle on Tracks' can be summarized as a Railbus, which is a type of rail vehicle that is designed to carry passengers. It is usually powered by an internal combustion engine and runs on tracks, similar to a train. Railbuses are often used in areas where the terrain is too difficult for a regular train to traverse, or where the cost of building a railway line would be too expensive. They are also used as a form of public transport in some areas.