Polish railway operator Koleje Dolnośląskie (KD) is initiating consultations for the acquisition of new trains to replace aging rolling stock on non-electrified routes and facilitate the shift towards environmentally friendly technologies. While temporarily resorting to diesel trains, KD has a long-term vision of transitioning to clean energy, exploring options like hydrogen and battery models. The company's commitment to sustainability aligns with its strategy of modernizing rolling stock to comply with environmental standards and enhance operational efficiency. By evaluating proposals from train manufacturers, KD aims to find cost-effective solutions that meet technical and financial criteria. The focus is on long-term economic efficiency, assessing the total costs of train operations over a 30-year period, including fuel consumption, maintenance, and software updates. If hydrogen or battery-powered trains align with KD's requirements, a formal tender will be launched. This strategic move reflects KD's goal of achieving a sustainable regional rail network in Poland amidst budget constraints and rising transport demands.