Reliability and safety concept is related to the implementation of the transport complex and transport control system elements (automated control systems, rolling stock) technical evaluation of technical conditions. Maintenance tech’s real goal is to prevent use of the damaged elements and, if it does not comply with the condition set out in the request, and it fault or failure can lead to situations and events, with the consequences that endanger human life, property or the environment. The purpose of learning tools to provide general knowledge about the technical condition evaluation of automated systems and equipment, the functioning of the detector principle of operation and use.