Noise exposure on the A87 motorway for the Lden 68 period (exceeding value at 68 decibels)

Database defining the English-speaking land transport infrastructure exceeding value (68 dB) over the Lden period (Article R 572-5 of the Environmental Code). __Origin__ The European Directive 2002/49/EC on evaluation and management noise in the environment is aimed at, by means of noise maps strategic to assess noise exposure in a harmonised manner in all 27 member states. Its aim is to prevent and reduce the effects of noise. It has been transposed into French law by ordinance, ratified by the Law of 26 October 2005, and appears now in the Environmental Code. What is strategic noise mapping? It allows a representation of noise levels, but also to count the exposed population, quantify the nuisances, develop action plans (preservation of quiet areas). This mapping has an informative character. • Noise maps are developed for large infrastructure and large agglomerations. They relate to roadways used by more than 6 millions of vehicles per year and railways counting more than 60,000 train crossings per year. • Large agglomerations are those in the INSEE sense of more than 250,000 inhabitants. Principle for the development of strategic noise maps Noise maps are drawn up, with harmonised indicators Lden (for the day) and Ln (for the night). Noise levels are evaluated using digital models integrating the main ones parameters that influence noise and its propagation. The noise maps thus produced represent: • areas exposed to more than 55 decibels in Lden (day) • areas exposed to more than 50 decibels in Ln (night) They represent the isophone curves of 5 in 5 decibels. Limit values exceedance map These are maps representing areas where limit values in Lden (day) and Ln (night) are exceeded (Article R 572-5 of the Code of the Environment). __Partner organisations__ DDTM Vendée __Links annexes__ * [XML metadata view](http://ogc.geo-ide.developpement-durable.gouv.fr/csw/all-dataset?REQUEST=GetRecordById&SERVICE=CSW&VERSION=2.0.2&RESULTTYPE=results&elementSetName=full&TYPENAMES=gmd:MD_Metadata&OUTPUTSCHEMA=http://www.isotc211.org/2005/gmd&ID=fr-120066022-jdd-9fe22b01-3f47-4af9-aff0-8eab23eb5617) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/7f5c0f6e7a5ae2bb16979c5f43cbc5281575e431)