On June 9, 2025, Saarbahn debuted the first CITYLINK TramTrain in Saarbrücken, marking the start of the VDV-TramTrain project—Europe’s largest cross-border rail initiative. Manufactured by Stadler, up to 504 hybrid tram-rail vehicles will serve six operators across Germany and Austria. With rigorous testing and shared approval processes, this landmark €2 billion project promises cost-efficient, sustainable, and flexible urban-regional transport for the future of European mobility.