Noise Zones (maps A — Ln indicates the location of noise emissions at night) in Upper Rhine

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.
Type A: areas exposed to noise with LN indicator, night noise.

噪声等级区（Noise level zones）指依据噪声指标或受噪声影响的区域，用以描述噪声暴露状况的划分类型。其主要用于依据《环境法典》第R.572-5条编制战略噪声地图。
A类：采用LN噪声指标的夜间噪声暴露区域。