Algorithm of the influence of the road transport system on its operational safety

Safety is a priority criterion of the transport systems operation referred to as a total of means and activities connected with carrying of people and cargo. The main goal of systems of this typ e is safe carrying people in set quantities and over an assigned area, by means of transport means used in the system. Road transport is the most frequently used branch of transport. It is characterized by high speed and flexibility of transport tasks accomplishment resulting from a big number of roads which enable carrying passengers or cargo directly to the place of destination. Road transport can be distinguished from other transport branches by the following features: unlimited access to road transport means, high serviceability, high transport speed, providing services according to the schedule andpunctually. The system environment includes all components which belong to it in terms of the carried out analysis. External factors of the environment, due to a system approach to the analyzed system safety assessment include: weather conditions, road surface, inappropriately designed infrastructure, kinds of roads. The paper identifies the source of safety threats of transport systems caused by the influence of weather conditions on people and technical means of transport.