The Ruhr-Sieg railway is a key railway line in Germany that connects the industrial region of Ruhr with the Sieg valley. It runs from Dortmund to Siegen, facilitating both passenger and freight transport. This railway plays a significant role in linking major cities and supporting the economy of the surrounding areas. Opened in the mid-19th century, the Ruhr-Sieg railway has undergone several upgrades to improve efficiency and safety. It features scenic routes through the Sauerland region, making it popular among tourists. The line is an essential part of the German railway network, contributing to regional connectivity.