The viaduct

This viaduct is one of the more important road equipment in all Belgium. It's an enormous metallic viaduct on an highway crossing the Mass / Meuse river. All internal structure is hollowed. This recording is made inside the box girder bridge. Trucks make everything terribly vibrate, and all duckboard is slowly jumping. It makes this parasite bling-bling sound, but that's normal, as it's a segmental bridge. Swings are huge !