Transportation is an indispensable component of societal and economic development. As society progresses in all spheres, there arises a demand for a functionally more efficient, technologically advanced, and effective transportation system. Railway transportation stands out as a sector that can meet these requirements sustainably through the implementation of appropriate measures. Optimizing the cargo transportation plan represents a pivotal challenge in enhancing the competitiveness of railways compared to other modes of transportation. The best results are achieved through high-quality collaboration among all relevant stakeholders in the transportation process, including carriers, users, and the government. Petrokemija d.d. Kutina is a major user of railway services, transporting significant quantities of raw materials necessary for production and finished products utilizing railway transportation services. This research demonstrates how mutual cooperation between railway carriers and large industrial entities can optimize various elements of the transportation process. Thanks to its infrastructure and human resource capabilities, Petrokemija can strongly influence the development of an optimal transportation plan. The goal of this study is to thoroughly analyze the methods and techniques that positively impact railway transportation for the needs of Petrokemija.