Nocturnal Noise Level Indicator - Cumulative

Indicates noise levels induced by road, air and rail transport infrastructure and facilities classified for environmental protection. (ICPE) Mapping represents isophone curves plotted in increments of 5dB(A) from 50dB(A) The Ln (Night for Night) is the indicator of the average night noise level (22h-6h). The entry was made for a cartographic restitution scale of 1/10,000th. The cards will be updated every 5 years.