Map visualisation service (WMS) of the dataset: Noise zones (Type C map, LD index) of the A50, national road network granted

European Directive 2002/49/EC of 25 June 2002 on the assessment and management of environmental noise involves, for EU Member States, an assessment of environmental noise emitted in the vicinity of major transport infrastructure (land and air) and in large agglomerations. This assessment is carried out in particular by drawing up strategic 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 previously developed maps. Strategic Noise Maps (CBS) are intended to allow the overall assessment of noise exposure and to make predictions of its evolution. CBS is required in particular for road infrastructure with an annual traffic of more than 3 million vehicles per year. For major road and rail transport infrastructure, the CBS are established, agreed and approved under the authority of the prefect of the department. The noise maps are drawn up according to the indicators established by the European directive, namely the Lden (Day Evening Night Level) and the Ln (Night Level). • Day/day: [6h-18h] • Evening/evening: [18h-22h] • Night/night: [22h-6h] The Lden and Ln indicators correspond to an energy average defined over the periods (Day/evening/night) for the Lden and (Night) for the Ln. The corresponding results are expressed in A or dB(A) weighted decibels. Type C maps represent areas where noise limit values are exceeded for residential, educational and health buildings. For high-speed roads and rail lines, the limit values are 68 dB(A) in Lden and 62 dB(A) in Ln.