This paper presents the transport of containers by rail and truck from Rijeka to Srbija terminals. The importance of connecting the Rijeka and Srbija terminals is shown through the work of the railway agent Adria Rail d.o.o. which is positioned at the Brajdica container terminal in Rijeka and through the work of the entire organization of Serbian terminals Nelt CO and Mbox Terminals d.o.o. Both Serbian terminals are privately owned, which represents a very good jump in development and financial performance for that country. Container transportation on the Rijeka-Serbia route is shown through block trains that run up to 35 times a week. Each block train is composed of special flat wagons intended for transporting containers by rail. For the transport to take place, there must be a correlation between railway operators, terminals and parties, namely railway forwarders and agents. Railway freight forwarders and agents perform the tasks of creating all customs and supporting documents for smooth traffic of block trains and connection of terminals. The third part of the paper discusses the improvement of the container transport service, which will present innovation technologies and strategies that will depend on the future of trains and terminals.