Noise maps in agglomeration: Noise level zoning (night) in the Landes department

The European Directive n°2002-49 of 25 June 2002 on the assessment and management of noise in the environment lays down the framework for noise control policy. The data were produced in response to Decree No. 2006-361 of 24 March 2006 on the establishment of noise maps and noise prevention plans in the environment. It specifies that noise maps and noise prevention plans in the environment are drawn up: (1) For each road and motorway infrastructure with annual traffic exceeding 3 million vehicles; (2) For each railway infrastructure whose annual traffic exceeds 30,000 train crossings; (3) For agglomerations with more than 100,000 inhabitants whose list is annexed to the decree. Noise zones were developed in 2008 in the Landes department. Four families of noise maps constitute the initial diagnosis according to four harmonised sound level indicators: Lden(level day evening night), Ln (level night), Lden greater than 68 dB(A) and Ln greater than 62 dB(A) Axes concerned in 2008: — motorway network: A63 A64, — national network: RN10, — departmental network: RD29 RD129 RD524 RD810 RD824 RD932E RD947, — Road network of Dax Reading these maps imposes some precautions detailed below. __Origin__ The aim of the maps is to assess the inconvenience caused by noise from road and rail infrastructure. The calculation and representation methods use the indicators Lden and Ln, which weighed the real noise by giving it a stronger importance in the evening (+ 5 dB) and at night (+ 10 dB). On the other hand, these maps are based on sometimes flat-rate input data, and evaluate the resulting noise by the calculation. They offer a macroscopic vision of noise exposure. They are not based on measures and therefore do not necessarily constitute a faithful transcript of reality. Finally, they are readable only at the precision scale of the twenty-five thousandth. A cadastral reading therefore has few values. __Partner organisations__ DDTM Landes __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-a076c2d5-b1c6-46a1-8c45-0a617dc3131e) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/f3a3251dabc3931ece38b253728f491d3beb6bc4)