Noise under Control
The fact that we base our computational models on field measurements of noise from high-speed railway operations in France demonstrates our diligence in this area. We comply with legal standards as a matter of course and do everything possible to ensure that no excessive noise pollution is generated anywhere. We simply keep the noise down and under control.
Noise
It is part of every mode of transport. For the operation of trains on High-Speed Lines, there are a number of measures to mitigate train noise or eliminate it altogether. These are noise barriers, embankments and running of the line in cuttings.
We consider noise reduction in the project design phase by paying close attention to routing – running the line in cuttings and outside of populated areas. Trains will also not run on the HSL at night, with a few exceptions, as only maintenance is planned at that time.
How Noise is Generated on HSL
Trains make different types of noise at different speeds. High-Speed Railway is characterised by what is known as aerodynamic noise, which is generated by speeds above 200 km/h. It is mainly caused by the vehicle cutting the air with its movement. However, it also spreads through the rail, the contact line, the current collector, and the track construction. It can be successfully suppressed by appropriate noise-protection measures.
Vibration
Soil and geological surveys are carried out on each projected line section to show the potential risks of vibration transmission.
Depending on the results of the survey, appropriate anti-vibration measures will be implemented as part of the construction. In cooperation with the surrounding communities, measures are always tailored to the specific location for maximum effect.
Terrain Noise-Protection Measures
How We Approach Noise-Protection Measures
Noise barrier walls and embankments are integrated into the landscape to complement the landscape character.
- We always place them with the aim of making the track as much a natural part of the landscape as possible.
- We opt for non-massive solutions placed directly at the noise source.
- Barriers are 2 to 4 metres high.
- Proposals for noise-protection measures are based on the results of expert studies and are always discussed with the subjects affected, e.g. municipalities.
Noise-protection measures can also be used near individual houses and buildings.
- It is always necessary to carefully assess each site and propose effective measures.
- This can be as simple as replacing windows with new ones that have better sound insulation, or even making changes to building facades.
- In relevant cases, the removal of the affected building from the dwelling stock can also be addressed.