As part of a redevelopment contract from the Confederation, SBB has installed noise barriers to protect residents from railway noise. Moreover, when required, noise barriers have been, and continue to be installed when expansion projects are carried out. Where noise limits are still exceeded, sound-insulating windows have also been installed on the affected houses.
Today, SBB is considered to have achieved reduced noise as per the Noise Abatement Ordinance, which is authoritative for SBB. This means that additional noise protection measures along the existing infrastructure only need to be considered if, for example, an additional track, more trains or other changes to the infrastructure result in a considerable increase in noise.
SBB’s environmental specialists will assess this on a case-by-case basis during the building permission process, in line with the requirements of federal law. As part of the permit process, this assessment is reviewed by bodies such as the environmental authorities of the Confederation and the cantons concerned.