To strengthen regional connectivity and integration, the European Union is providing a €175.6 million financial package for the reconstruction of 39 km of the Bar–Golubovci railway line, a key section of Rail Route 4 on the extended TEN-T Core Network. This vital corridor connects Belgrade to the Port of Bar, linking Montenegro and the Western Balkans with Central Europe. Once completed, the upgrade will increase train speeds and improve railway reliability, safety, and capacity. The project will raise the quality of rail service, accommodating 1.3 million passengers and transporting 1.85 million tonnes of freight annually. It will promote multimodal transport, strengthen resilience to climate change, and advance Montenegro’s green transition by shifting traffic from road to rail.