Since 2009 Piedmont Region has started the design of a Public Transport (PT) integrated electronic ticketing system (BIP – Biglietto Integrato Piemonte) on the whole regional area. The project was aimed at increasing user accessibility through more flexible electronic ticketing. This paper focuses on a specific BIP application that, using data gathered in BIP environment, enables public stakeholders to have a detailed monitoring of PT service users’ behaviours, that represents a fundamental element for PT planning, programming and management. The user behaviour estimation, based on state of art literature, covers a whole regional area with heterogeneous transport modes and a complex transport network. Results were so promising that the algorithm has become a software component used in every regional BIP PT user behaviour analysis. The following chapters provide details on data, algorithms and tests and results developed to estimate travellers’ habits through the regional BIP platform.