Road noise – Exposed areas, from 22h to 6h (indicator Ln)

_\— _(see comment in the Admin section)_ ** ** ** ** **Strategic Noise Map** Data produced by Impédance engineering on behalf of the metropolis Aix-Marseille Provence ** ** On the map, the geographical shapes have been simplified in order to optimise the display of the layer. The entire layer, without simplification of geographical shapes, is available in SHAPE format in the Export/Alternative Export tab. **** The symbology associated with the noise map is available in the attachment in QGIS format. Road noise according to the Ln indicator for type A maps on the Aix-Marseille Provence Metropolis. Results of acoustic modelling calculations. Type A map locates areas exposed to noise. The value of the noise index Ln “Level night”, expressed in weighted decibels A (dB(A)), represents the level of noise exposure at night.