E-highways: Trucks can save half of their CO₂ through overhead lines. On motorways with overhead lines, some trucks drive electrically, and some of the energy can be temporarily stored in batteries.

Researchers are drawing positive initial conclusions in the context of a pilot test on the route between Lübeck and Reinfeld. However, criticism of the pilot test came from the Schleswig-Holstein Taxpayers' Association. He considered the experiment a failure and called for an end to the field test.