Simple download service (Atom) of the dataset: Noise zones (Type A map, LD index) of the Var departmental road network

European Directive 2002/49/EC of 25 June 2002 on the assessment and management of environmental noise entails for EU Member States an assessment of environmental noise in the vicinity of major transport infrastructure (land and air) and in large agglomerations. This assessment is carried out in particular through the development of ‘so-called’ noise maps, the first series of which were drawn up in 2007 (1st deadline of the Directive) and 2012 (2nd deadline). Article L572-5 of the Environmental Code states that these maps are “reviewed, and if necessary revised, at least every five years”. Thus, the implementation of this review leads, in 2017 and as appropriate, to revise or renew the maps previously developed. Strategic Noise Maps (CBS) are designed to allow for the overall assessment of exposure to noise and to forecast its evolution. CBS are required in particular for road infrastructure with annual traffic of more than 3 million vehicles per year. For major road and rail transport infrastructure, the CBS are established, decided and approved under the authority of the prefect of the department. Noise maps are developed according to the indicators established by the European Directive, namely Lden (Day Evening Night Level) and Ln (Night Level). • Day/day: [6h-18h] • Evening/evening: [18h-22h] • Night/night: [22h-6h] The Lden and Ln indicators correspond to a defined energy average over the periods (Day/Black/Night) for Lden and (Night) for Ln. The corresponding results are expressed in A or dB(A) weighted decibels. Areas exposed to noise (type A map): These are two cards representing • areas exposed to more than 55 dB(A) in Lden • areas exposed to more than 50 dB(A) in Ln They are presented in the form of isophone curves materialising areas of the same sound level and are plotted by step of 5 dB(A) from the threshold of 55 dB(A) in Lden and 50 dB(A) in Ln. For a list of pathways, please refer to the non-technical summary (page 9).2002年6月25日发布的欧盟第2002/49/EC号指令《环境噪声评估与管理》要求欧盟成员国对主要交通基础设施（陆地与航空）周边及大型聚居区的环境噪声开展评估。 该项评估尤其通过绘制所谓的噪声地图开展，首批噪声地图分别于2007年（指令首个截止期限）与2012年（第二个截止期限）完成编制。 《环境法典》第L572-5条规定，此类噪声地图至少每五年需进行一次复核，必要时予以修订。 因此，该项复核工作于2017年启动，并将根据实际情况对此前编制的噪声地图进行修订或更新。 战略噪声地图（Strategic Noise Maps，CBS）旨在实现噪声暴露的全域评估，并对其演化趋势进行预测。 战略噪声地图尤其适用于年车流量超过300万辆的公路基础设施场景。 针对主要公路与铁路交通基础设施，战略噪声地图的编制、审定与核准需由所在省省长负责审批。 噪声地图需依据欧盟指令规定的指标进行编制，即Lden（昼间夜间等效声级，Day Evening Night Level）与Ln（夜间等效声级，Night Level）： • 昼间时段：6时至18时 • 晚间时段：18时至22时 • 夜间时段：22时至次日6时 Lden与Ln指标分别对应昼间、晚间、夜间时段（针对Lden）以及夜间时段（针对Ln）的能量平均声级，计算结果以A计权分贝（dB(A)）为单位进行表征。 噪声暴露区域（A型地图）： 该类地图包含两张子图，分别用于展示： • Lden指标超过55 dB(A)的噪声暴露区域 • Ln指标超过50 dB(A)的噪声暴露区域 两张子图均以等声级线（isophone curves）形式绘制，用于标示相同声级的区域，绘制步长为5 dB(A)，分别以Lden的55 dB(A)与Ln的50 dB(A)作为起始阈值。 如需获取路径清单，请参阅非技术摘要（第9页）。