Areas affected by noise in Orne (Type B map)

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 strategic ‘so-called’ noise maps. These maps are intended to be reviewed and revised every 5 years. The first series were developed in 2007 (1st deadline) and 2012 (2nd maturity). 2017 is therefore the year of the 3 rd deadline. CBS are required, in particular, for rail infrastructure with more traffic than 30 000 train crossings 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.source: CEREMA Normandie centre — validity: prefectural Order of 27/02/20192002年6月25日发布的欧盟第2002/49/EC号《环境噪声评估与管理指令》要求欧盟成员国，对主要陆路、航空交通基础设施周边及大型聚居区的环境噪声开展评估。此类评估主要通过构建战略性噪声地图（业内俗称‘噪声图’）推进。此类地图需每5年进行一次复核与修订。首批地图于2007年（首个截止时限）与2012年（第二批完成版）编制完成，因此2017年为第三批地图的截止编制年份。针对年列车通行量超过3万次的铁路基础设施，需编制战略噪声地图（CBS）。对于主要公路与铁路交通基础设施，战略噪声地图（CBS）由所在省的省长负责确立、审定与批准。噪声地图需依据欧盟指令规定的噪声指标编制，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指标分别对应各时段（昼间/晚间/夜间）的能量平均值（针对Lden）以及夜间时段的能量平均值（针对Ln），计算结果以A计权分贝（dB(A)）或分贝（A）表示。数据来源：法国诺曼底中央环境与能源管理研究中心（CEREMA Normandie centre）；有效性依据2019年2月27日省长令。