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The article is devoted to finding ways to improve the maintenance of infrastructure. And suggested the expediency of refinement tools used methodology Urra, allowing significantly taken into account in the risk assessment process imperfect operation of the infrastructure associated with the influence of the «human factor».

The article examines a possible approach to the construction of evaluation model of human influence on the functioning of human-machine systems. Formalization of procedures for the analysis of human influence in the «man - machine - environment» for their further integration into the risk management system is being implemented at JSC «Russian Railways» will improve the quality assessment and risk analysis, and, accordingly, to ensure the required level of security in rail transport.