Road noise - Exposure of Parisians to exceedances of night or full day thresholds

Dataset on the exposure of Parisians to exceedances of night-time or full-day thresholds for road noise: these data make it possible to know annually the number of Parisians subject to an exceedance of the regulatory threshold for the night (Ln) or for a full day (Lden)

These data were determined using the CNOSSOS method.

CNOSSOS Method (Common NOise aSSessment methOdS)

The CNOSSOS method, taken over by European Directive 2015/996 of 19 May 2015, aims to provide a common noise assessment model for the various countries of Europe. It specifies in Annex II to the Directive the sound propagation algorithms applicable to road noise, industrial noise, rail noise and air traffic noise.

COMMISSION DIRECTIVE (EU) 2015/996 of 19 May 2015 establishing common methods for noise assessment pursuant to Directive 2002/49/EC of the European Parliament and of the Council

Definition of indices

Lden (level day evening night): European index characterising the average noise of a transport infrastructure over 24 hours, in dB(A) and 2 m on the façade. This average noise level is weighted 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 nuisance during these two periods. Thus, this indicator is calculated on the basis of the equivalent levels over the three basic periods: day, evening and night to which a weighting is added according to the period of the day

· Ln (level night): European index characterising the average noise of a transport infrastructure at night, from 10 p.m. to 6 a.m., in dB(A) and 2 m on the façade. It is equivalent to the French-speaking index LAeq_nuit

NB: a corrective term of ‘-3 dB’ applies to European indices so as not to consider the last reflection on the front.

Definition of regulatory values

National legislation: Decree No 2006-361 of 24 March 2006 and Decree of 4 April 2006, relating to the drawing up of noise maps and plans for the prevention of environmental noise.

· Lden < 68 dB(A)

· Ln< 62 dB (A)

WHO Recommendations (2018): WHO Recommendation

· Lden < 53 dB(A)

· Ln< 45 dB (A)

Information sources

The data provider is noiseparif >> the rumor platform | Bruitparif + Treatment Ville de Paris - DTEC to determine the impacted population per arrondissement.

Link Paris.fr https://www.paris.fr/pages/noise-and-nuisances-sonores-162/