Map layer road, 24h level LDEN

Outside the agglomerations, major roads (highways, federal and state roads) with a traffic volume of over 3 million vehicles per year are to be mapped. In addition, other noise-relevant roads such as municipal roads or roads with lower traffic volumes are mapped in the agglomerations.在城镇集聚区域（agglomerations）以外，需绘制年车流量超过300万辆的主要道路，涵盖高速公路、联邦级道路及州级道路。此外，在城镇集聚区域内部，还需绘制其他与噪声相关的道路，例如市政道路或车流量较低的道路。