The development of international cargo transportation has been relevant since the emergence of the international division of labor. The transport system is considered the "circulatory system" of the country's economy, which makes it a key link in the implementation of economic reforms in the country. The transport industry has significant social significance, which also determines the specifics of the phased market transformations. The development of international multimodal transportation is becoming a new trend in the development of the transport services market. The paper examines the system of international transportation of the Eurasian Economic Union (EAEU), the integration of the transport system, and the formation of single transport space. The article examines the issue of the specifics of freight transportation by each type of transport, highlights the advantages and disadvantages, evaluates the combined (multimodal) transportation. The authors analyzed the ongoing freight traffic in the Russian Federation, deduced trends in the development of the industry and changes in the directions of movement of goods. The integration of the EAEU transport systems contributes to the economic growth of the Union states, the reduction of their transport isolation, the expansion of intra-union and international economic ties, and an increase in the volume of transit traffic. Due to the favorable geopolitical position of the EAEU countries, an increase in transit cargo flows will allow the Union to become one of the leaders in the world freight and passenger transportation market.