Purpose: to develop proposals for the development of the expected growth in traffic volumes along the North–South transport corridor. To assess the capacity of the Upper Baskunchak — Astrakhan — Olya port section as the most heavily loaded, where cargo flows from several directions merge. To show the need to unload the main direction of the North-South corridor and form a network of alternative routes in the transport corridor to ensure transportation guarantees in case of force majeure. Consider the possibility of attracting parallel routes through the North Caucasus Railway (SKZHD). Methods: the calculation of throughput was carried out using the methodology used in JSC “Russian Railways” and the author’s proposals, taking into account additional reserves of throughput. General logical methods were used — quantitative and qualitative analysis and synthesis, induction and deduction, analogies, classifications, a combination of historical and logical analyses. The proposed universal algorithm, which makes it possible to evaluate the possibility of choosing parallel moves, can be recommended for practical use. Results: the maximum number of trains that can be redirected to parallel routes has been established, taking into account the available capacity and their workload with export cargo traffic in the direction of the ports of the Azov-Black Sea basin. The relevance of the direction of development of heavy traffic aimed at reducing the required capacity and reducing inter-train intervals to increase the available capacity is shown. A universal algorithm has been formed that allows evaluating the possibility of choosing parallel moves. Practical significance: the necessity of mastering the expected cargo flow and preventing its departure to competing destinations, for example, through the Suez Canal, is shown. In the current political and economic conditions, the North — South International Transport Corridor (ITC) is changing its status: from an alternative to the Suez Canal, it is becoming one of the priority routes for Russian export cargo traffic.