Noise — Overrun of limit values at night (Type C Ln) 2nd deadline

Areas where the noise limit values are exceeded (concerns buildings d' dwellings, d' education and health) between 10 p.m. and 6 a.m. (Ln: night: — 62 decibels for roads with an annual traffic exceeding 3 million vehicles — 65 decibels for railway axes flowing more than 29000 trains per year This study complements the strategic first-time noise maps developed by the Technical Equipment Studies Centre (CETE) in 2008 for road infrastructure with an annual traffic of more than 6 million vehicles. In order to ensure homogeneity of renderings, the entire line already mapped has been revised, beyond the recommendations of the Directive [1] requiring revision when the expected deviation exceeds ± 2 dB. __Origin__ COVADIS standardisation of the digital data of the PPRn of the departments of the Aquitaine region. The information contained in this dataset is from the GASPAR V4.0 database as of October 1, 2013. This table is rendered geometrically using the IAL perimeter (prescription perimeter when the PPR is prescribed or perimeter regulated when the PPR is approved).The geometry of the prescribed perimeter of {\#x27; a PPR is provided by the prefectural prescription order of this PPR. The geometry of the regulated perimeter of a PPR is constructed by l' geometric aggregation of polygons representing the zones restricted by the PPR.Source of georeferencing:- cadastral reference PCI (DGFIP) or BD Parcellar (IGN) name, version and news to be specified- Scan25 (IGN): number and year of l' edition to be specified- BD CARTO (IGN) or GeoFLA (IGN) (number and year of l' edition to be specified) for prescribed PPRs — List of prescribed and approved PPRNs on the department based on existing information in the; GASPAR application for monitoring PPR procedures. __Partner organisations__ DDT Haute-Garonne __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-a0cef89b-3bfa-46cb-a0b1-8b8bf1990257) * [COVADIS data standard: Risk Prevention Plan PPRN PPRT](http://geostandards.developpement-durable.gouv.fr/afficherPageStandard.do?id=15) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/a916bb2c31fd6eaded8deb2d4f4f92bb0021861d)