Introduction. Generators of population mobility. Potential mobility and limitations. Methods for researching the travelling properties. Defining quality properties for transport services. Organizational service support. Service usability. Service availability. Service stability. Production ability of the system. Reliability of technical exploitation. Forecasting transport demands. Generating travel by zones. Spatial distribution of travelling. Mode classification of travelling. Evaluation methods and modes in subsystem selection. Demands of behaviouristic factors in transport service quality according to public transport system quality.