Quality has a fundamental influence to the services in passenger transport. The main objective of transport is to satisfy customers’ (passengers’) requirements on the qualitative, flexible, fast and safe carriage of people and goods. Organisers of transport (public authority), providers of transport services and their customers have a different view on the perception of quality. This fact is influenced by unsystematic assessment to the quality measurement as well as by ignorance of the interaction of the transportation the peoples with the transport system. The paper is focussed on the quality evaluation of performance in regional passenger rail transport in relation to other modes of public transport. Hereby it is necessary to research the perception of quality services as well its value for the client (passenger) as well to on scientific approach. In this point of the technological process of transport, the main bearer of the quality of transport services are the vehicles and the transport infrastructure. Consequently it is needed to set a permanent process of quality evaluation of the provided transport services. The paper is based on the premise that the customer interests present the public ordering body (authority) of the public transportation services.