Security in public transport, alongside “traditional” parameters, such as punctuality, frequency, efficiency, etc., is increasingly becoming a central issue in the public debate on transport.It is a crucial issue for service provision because it involves all of the stakeholders. On the one hand, security concerns transport operators (their staff, vehicles and infrastructure), on the other, it affects public transport users. Thus the issue directly and indirectly concerns the whole community and, by its very nature, has to be considered as both a technical and social issue...