System approach to study of traffic accidents with hazardous substances presence

The traffic accidents with presence of hazardous substances have been occurred at transportation on roads, rail roads, rivers, seas, oceans and in air. To the origination of such accident there has been contributed the items as: vehicle design, traffic speed, roadway design, environ round roadway, skill and defects in driver's behavior, and also the properties of shipped hazardous substances. On the basis of integral safety concept the considered accidents are solved as mobile sources of risks. The paper contains the results of research obtained by critical analysis of impacts of relevant accidents in the word and in the Czech Republic, and proposals of measures for upgrade of safety of considered shipping that improve protection of humans from hazardous substances.