Map of type “c” locating the areas exceeding the limit value defined for railway infrastructure in Ln, nighttime noise indicator, 65 dB(A) — Réseau Ferré de France — Decree of 12/02/2013
__Origin__
Noise levels are evaluated using numerical models incorporating the main parameters that influence noise and its propagation.
These are areas where the limit value defined for railway infrastructure in Ln, nighttime noise indicator, is exceeded for the year in which the maps are drawn up.
__Partner organisations__
DDTM Loire-Atlantique
[See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/993dade5f79fdfcf97c99b96b93955f8f47c290d)
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