Areas exposed to the noise of the departmental road 611 from Niort to La Crèche and to Parthenay at night (Ln) in Deux-Sèvres

The European Directive on Strategic Noise Maps requires as a minimum the representation of the overall noise indicators Lden and Ln, for each source. These indicators correspond to the incident noise on the facades. The indicators represented are expressed in dB(A) and reflect a notion of overall discomfort or health risk. The data represents areas exposed to land transport infrastructure noise at night (Ln) using isophone curves drawn in steps of 5 dB(A) starting at 50 dB(A). The routes concerned are.................................. to..................... The Ln is the average sound level that isolates the night period (22h-6h). It can be associated with the risk of sleep disruption. Articles L572-1 to 11 of the Environmental Code laying down various provisions for adaptation to Community law in the field of the environment and the implementing texts (Decree No 2006-361 of 24 March 2006, Decree of 4 April 2006 and Circular of 7 June 2007 on the drawing up of noise maps and plans for the prevention of environmental noise) provide for the indicators, the calculation methods to be used and the results I'm waiting for you.