The article is devoted to the problem of digitalization of sanitary trains, which ensure the stage of medical evacuation of victims in emergency situations. In order to improve the quality of medical and diagnostic measures along the route, and the use of existing digital medical services, it is necessary to create a “smart mercy train” (UPM) equipped with modern information and telecommunications facilities. Relevance: At the stage of the digital transformation of Russian Railways, ensuring the timeliness and efficiency of medical evacuation of victims is possible by creating a “smart mercy train” using existing solutions for objects of an intelligent transport system. The choice of equipment for an intelligent transport system is determined by the volume and type of information of a medical and administrative nature. Objective: To assess the projected information flows and functional needs of a “smart” means of medical evacuation by rail in emergency situations. Methods: Methods of expert survey, system analysis and theory of operations research were used. Results: An analysis of existing solutions for the creation of a “smart” means of medical evacuation by rail is presented. The internal and external information flows received by the head of the mercy train, which need special technical support (means of communication), are ranked. The place of the integrated personal electronic medical record at the stages of medical evacuation within the framework of the Unified Military Medical Information System has been determined. The results of the creation of a digital “smart mercy train” are determined. Practical significance: Taking into account the assessment of projected information flows and functional needs of communication users in the UPM made it possible to determine the required types of communication and the speed of information transfer for the implementation of the functions of communication users, which will further calculate the average subscriber load on the UPM communication network.