Noise-exposed areas for type A map LN indicator — rail network

Noise-exposed areas for type A map LN indicator — rail network Noise-exposed areas for type A map LD indicator — rail network Noise level zones describe a noise exposure situation based on a noise indicator or area affected by noise. They are used primarily for the preparation of strategic noise maps pursuant to Article R.572-5 of the Environmental Code.适配A类地图的LN指标（LN indicator）噪声暴露区域——铁路网络 适配A类地图的LD指标（LD indicator）噪声暴露区域——铁路网络 噪声级区域依据噪声指标或受噪声影响的范围界定噪声暴露状况，主要用于遵照《环境法典》第R.572-5条编制战略噪声地图。