Acoustic ModellingNoise assessment and exposed population
Noise Mapping describes the existing or forecast noise situation in order to identify the number of citizens exposed to excessive noise levels and guides the responsible authorities in selecting the most appropriate mitigation strategies. The entities required to prepare Noise Mapping for noise assessment are the operators of public transport services or the related infrastructure, with road axes on which more than 3’000’000 vehicles per year transit, railway axes on which more than 60’000 convoys per year transit and the main airports. The validity of the Mapping is 5 years.
Noise Mapping therefore makes it possible to carry out noise assessment through the sound isolines relating to the different environmental indicators (Lden, Lnight), the population exposed to the different acoustic classes and the number of sensitive receptors located within the different acoustic bands. Once any critical issues have emerged, possible mitigation strategies are identified for the different areas of the territory, described, analysed and quantified within the related Action Plan.
Possible interventions include:
- establishment of limited traffic zones;
- construction of roundabouts;
- noise barriers;
- installation of speed bumps;
- resurfacing of the road surface;
- low-noise asphalt.
