Road noise – Areas where limit values are exceeded, over 24 hours (Lden indicator)

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(see comment in the Admin section)

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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.

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Road noise according to the Lden indicator for type C maps on the Aix-Marseille Provence Metropolis.

Results of acoustic modelling calculations.

Type C map locates areas where limit values are exceeded.

The Lden indicator (for Level day-evening-night) represents the weighted average noise level during the day by giving a stronger weight to the noise produced in the evening (18-22h) (+ 5 dB(A)) and during the night (22h-6h) (+ 10 dB(A)) to take into account the increased sensitivity of individuals to noise pollution during these two periods.