The article describes the current state of automatic control systems of subway trains (SAUP M). It provides the classification of existing SAUP M based on the level of automation, according to the International Association of Public Transport, as well as on other criteria. The article describes international and Russian experience in implementing of SAUP M and classification of implemented by numerous developers solutions by the levels of automation. It also provides a typical three-tier architecture of SAUP M and description of the functional purpose of all levels. There are also the description and layout of span equipment of SAUP M based on the example of RFID tags (Radio Frequency Identification). The article demonstrates the architecture of the hardware and software of the main automatic train operation control room. It highlights the current condition of automatic train operation systems on the lines of St. Petersburg subway. The article also reveals technological prerequisites for the development of SAUP M and operation algorithms for automatic train operation apparatus for target braking at the station and passing the spans.