(Semi-)automated truck convoys have the potential of generating substantial reductions in energy use and emissions. Here we outline how infrastructure-based management (I2V) adds significant momentum. We present some of the rationale from our recently started national lighthouse demonstration project, link our project design to other ongoing truck-platooning projects, present four use-cases, key research questions, planned solutions, evaluation processes and an outlook into the near future. With a first generation of innovative truck-convoys expected to come to market soon, all ongoing demonstration exercises might help testing the bottlenecks for C-ITS deployment. The national lighthouse project Connecting Austria's unique contribution to C-ITS demonstration is the specific focus on infrastructure issues and on parameterized traffic perspectives when evaluating energy-efficient semi-autonomous truck convoys. This uniqueness includes convoys at intersections before entering highways and after leaving highways. Connecting Austria links Austrian excellence to other leading international initiatives on energy-efficient truck convoys.