Dataset Direct Download Service (WFS): Strategic Map of the Noise Railway Infrastructure RATP T5: type A Ln

The strategic noise maps (CBS) are derived from the European Directive 2002/49/EC on the assessment and management of environmental noise. They are intended to inform the public about the levels of exposure to noise through graphic representations. In accordance with article R572-5 of the Environmental Code, the CBS include maps of areas exposed to noise, called “type A map”, in Ln (level night, night indicator from 10 pm to 6 am). The maps show the noise-exposed areas using isophone curves ranging from 50 dB (A) to 70 dB (A) and more by 5 dB (A). The CBS for major railway infrastructure, whose annual traffic is more than 30,000 train crossings, by the deadline of the Val-d’Oise, were approved by prefectural decree of 5 December 2018. They must be reassessed every 5 years.战略噪声地图（CBS）源自欧盟《2002/49/EC号环境噪声评估与管理指令》，旨在通过可视化图形向公众告知噪声暴露水平。 根据《环境法典》第R572-5条规定，CBS包含以夜间声级（Ln，即22时至次日6时的夜间噪声评价指标）划分的噪声暴露区域地图，即"A型地图"。 此类地图采用以5dB(A)为间隔、覆盖50dB(A)至70dB(A)及以上的等声级线（isophone），标示噪声暴露区域。 针对年列车通行量超过3万次的主要铁路基础设施的瓦兹河谷省（Val-d’Oise）CBS，已于2018年12月5日经省法令批准。 此类地图需每5年进行一次重新评估。