Highway in Saarland -> Strange overbuilding, do you know that?

Hi together, just before Saarlouis I have seen this very strange motorway superstructure and can’t explain to me yet conclusively what this should be. My ideas: 1. Bat protection cover -> the animals cross the highway on their route and are prevented by the tension on the low flight (which would be fatal). 2. Lightning discharge device -> Asks only for what? Is there something under the highway? 3. Modern art -> but then very incomprehensible. Who approves an artist in the d irekten area of the StVO to build a work of art. When a wire crashes down there? 4. Volvo catch net -> is of course nonsense, but maybe the wires are automatically drained after a toll bridge monitoring and “catch” so sought-after cars 😉 No – I’m not particularly paranoid … …