DDT 70 — Strategic Noise Map — NIGHT Type Map in Haute-Saône

The European Directive 2002/49/EC on the assessment and management of environmental noise aims at a harmonised assessment of exposure to noise in the Member States. It defines them as representations of data describing a noise situation according to a noise indicator, indicating exceedances of limit values, the number of persons exposed.
Noise maps are not prescriptive. These are information documents that are not legally enforceable. As graphic elements, however, they can supplement a Local Planning Plan (LDP).
As part of an Urban Travel Plan (UDP), maps can be used to establish baselines and target areas where better traffic management is needed.
Noise zones are geometric elements of the strategic noise map. For type A maps (CBSTYPE), each noise zone is usually bounded by 2 isophone curves (Lden 55-60, 60-65, 65-70, 70-75 and Ln 50-55, 55-60, 60-65, 65-70) or by the lower limit isophone curve (Lden >75, Ln > 70). For type C maps (CBSTYPE), each noise zone shall be bounded by the lower limit isophone curve (Lden > 68 or 73, Ln > 62 or 65).

《欧盟2002/49/EC号环境噪声评估与管理指令》旨在对欧盟成员国境内的噪声暴露情况开展统一评估。该指令将噪声地图定义为基于噪声指标描述噪声状况、标注限值超标情况及受噪声暴露人群数量的数据表征形式。
噪声地图不具备规定性，属于不具备法律强制执行力的信息文档。但作为可视化图形元素，其可作为地方规划方案（Local Planning Plan, LDP）的补充材料。
作为城市交通规划（Urban Travel Plan, UDP）的组成部分，噪声地图可用于确立评估基准与需要优化交通管理的重点区域。
噪声区是战略噪声地图的几何构成要素。对于A型地图（CBSTYPE），每个噪声区通常由两条等声级线（isophone）界定，例如昼夜间等效声级（Lden）55~60、60~65、65~70、70~75区间，以及夜间等效声级（Ln）50~55、55~60、65~70区间；或以最低限值等声级线作为边界，例如Lden＞75、Ln＞70。对于C型地图（CBSTYPE），每个噪声区需以最低限值等声级线作为边界，例如Lden＞68或73、Ln＞62或65。