Vehicle operator as a threat source

The road transport systems are sociotechnical systems of a Human - Technical Object - Environment less than H - TO -E more than type. The primary operation goal of these systems is safe realization of the transport services. Safety is dependent on interaction of the following forcing factors: - working - depending on TO operation, - external - describing impact of the environment on people and technical means of transport, - antropotechnical - affecting a TO due to intentional and unintentional actions of a man. From the data regarding the reasons for road accidents in road transport systems provided by the Police results that 97% of the analysed reasons are antropotechnical factors. While 78% refers to improper drivers' actions that was why it was attempted herein to identify the sources of the threats resulting from the intended and unintended actions of the vehicle operators in a public road transport system. In order to increase safety of the bus passengers and people who are in the system environment, it is needed to undertake actions aimed at elimination or reduction of improper drivers' behaviours. Information of the paper may be an initial point for making decisions aimed at increased safety of the transport system operation.