Objective: To consider the issue of phased modeling of the logistics chain for the delivery of goods using rail and sea transport. To establish the goal and results of each stage of the simulation. To move to the construction of a descriptive model of the process under study. Methods: The analysis of the logistics chain of cargo delivery in multimodal transport, modeling of the logistics chain of cargo delivery with the construction of a descriptive model at the initial stage is applied. Results: A detailed diagram of the modeling stages is presented with the set goals and results of each stage. A fragment of the descriptive model was built at the stage of dispatching cargo traffi c from a railway station. Practical importance: The importance of consistent modeling of the logistic process is shown in compliance with the principles of the adequacy and effi ciency of the model. The importance of routing cargo fl ows to seaports is estimated

Purpose: To investigate the development of logistic chain of supplies from simple to maximal one, to consider informational flow evolution of logistic process till a single digital platform. To analyze the prerequisites for the transfer to a digital logistics and the level of development at the moment. To build the descriptive model of the interaction between a railway and sea transport. Methods: The research of the interaction between a station and a port is pursued in two major directions: information transfer, cargo traffic progression. The analysis of the development and classification of delivery chains is submitted. The descriptive models of document flow on import cargo traffic progression are built and analyzed. Results: The necessity of parallel development of transport and terminal complexes, RZD JCS infrastructure is pointed out for the transfer to network logistics stage. Information flow classification is presented. The descriptive model of the information interaction between a sea and port is built. Practical importance: The possibility to cut surplus document flow between a port and near-the-port station is shown, the need in such actions for the transfer to a single network platform is presented.

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