The approval was issued in accordance with the following key data: Gabione-type Silenzio Forte (galvanised wire baskets with fill) and with internal concrete core and absorber mat for maximum line speeds of V ≤ 160 km/h with heights exceeding the top edge of the rail at 53 or 74 centimetres and a standard distance to the track axis of 1.78 metres.
Hering had already built the first noise barriers of this type in 2011 as part of the federal government’s Infrastruktur-Beschleunigungsprogramm II (IBP – Infrastructure Acceleration Programme).
