Data batch direct download service (WFS): Noise classification and noise-affected sectors in the Loire-Atlantique in (2019) 2020 in Loire-Atlantique (road and rail network)

Noise classification of land and rail transport infrastructure and noise-affected sectors in Loire-Atlantique (2019) 2020 Noise classification of land transport infrastructure in the department of Loire-Atlantique: In each department, the prefect is responsible for identifying and classifying land transport infrastructure according to its acoustic characteristics and traffic (Articles L 571-10 and R571-32 to R571-43 of the Environmental Code). Land transport infrastructure is categorised into 5 categories, with category 1 being the noisyest. Each category is associated with a noise-affected sector width and a noise level to be taken into account by the manufacturers for the facade isolations to be implemented. The Order of 5 November 2020 revising the sound classification cancels and replaces the list of orders classifying land transport infrastructure in the department adopted between 19 May 1999 and 15 October 2018. Origin: The sound classification of transport infrastructure in the department of Loire-Atlantique was developed by a design office specialising in acoustics in accordance with the technical standards in force on the basis of the data provided by the infrastructure managers (SNCF Réseau, ASF, COFIROUTE, DIRO, Department, EPCI, Communes). The calculation is based in particular on traffic, the share of heavy goods vehicles, the pavement surface, speed. The ranking is based on traffic estimates at 20 years. Note the following limits on the accuracy of these layers: There is not always perfect overlay between sound classification and IGN (BD Ortho and BD Topo) repositories: there may be a discrepancy between the sound classification track and the areas affected by the noise, with the image plane backgrounds (SCAN25 or BDOrtho of the IGN as appropriate). Online mapping is provided for information purposes and only the tables annexed to the Prefectural Decree are authentic. Buffers are calculated from the centreline of the lanes, whereas in reality the limits of areas affected by noise must be calculated from the side of the road or the rail (source of noise), so one can have a few metres error for conventional roads and lanes, or even more for motorways. Partner organisation: DDTM of Loire-Atlantique卢瓦尔-大西洋省陆路与铁路交通基础设施及噪声影响区域噪声分类（2019年数据集，2020年修订版） 卢瓦尔-大西洋省陆路交通基础设施噪声分类： 法国各省省长须依据《环境法典》第L 571-10条及第R 571-32条至R 571-43条的规定，结合声学特性与交通状况，识别并分类陆路交通基础设施。 陆路交通基础设施共划分为5个等级，1级为噪声最强等级。各等级对应特定的噪声影响区域宽度与噪声限值，供建筑立面隔声施工的制造商参考采用。 2020年11月5日发布的噪声分类修订令，废止并替代了1999年5月19日至2018年10月15日期间出台的本省陆路交通基础设施噪声分类相关政令清单。 数据来源： 本数据集的卢瓦尔-大西洋省交通基础设施噪声分类，由一家专注声学领域的设计事务所依据现行技术标准编制，数据来源于基础设施运营方（SNCF Réseau、ASF、COFIROUTE、DIRO、卢瓦尔-大西洋省议会、EPCI、各市政当局）提供的相关资料。 该分类计算主要参考交通流量、重型货车占比、路面类型及行驶速度，等级划分以20年交通流量预测数据为依据。 精度限制说明： 请注意本数据集图层存在以下精度局限： 噪声分类图层与法国国家地理研究院（IGN）的BD Ortho、BD Topo数据集未必完全匹配；结合影像底图（如法国国家地理研究院的SCAN25或BDOrtho）来看，噪声分类划定的道路范围与实际噪声影响区域可能存在偏差。 在线地图仅作信息参考，唯有省长令附件中的表格方为官方有效版本。 本数据集的噪声影响缓冲区以车道中心线为基准计算，但实际噪声影响区域的边界应以噪声源——道路或铁路的路侧为基准划定，因此普通道路与车道存在数米误差，高速公路的误差可能更大。 合作编制单位：卢瓦尔-大西洋省DDTM de Loire-Atlantique