Lärmschutz für Anwohner in Hamburg - Wie ein Deckel die Autobahn leise macht | deutschlandfunkkultur.de
Hamburg, Germany. 09th Sep, 2021. The A7 motorway with new whispering asphalt between the Stellinger Deckel and the Hamburg-Nordwest junction. (Aerial view from the window of a scheduled flight) Credit: Christian Charisius/dpa/Alamy