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Number of road-traffic-noise-exposed residents (LDEN) in Hesse, Germany based on 2017 “PLUS-Mapping” [22] or the EU Environmental Noise Directive mapping of Hesse, Germany. According to the “PLUS-Mapping” 619,571 residents were not exposed to road noise (LDEN ≤ 40 dB[A]). Using the EU Environmental Noise Directive mapping, 5,474,104 residents were not exposed to road noise (LDEN < 55 dB[A]).
