Noise all road traffic 4th tranche Lden (line)

This file contains the contours Lden (55, 60, 65, 70 and 75 dB) of all provincial roads in 2021. This dataset shows the noise pollution of provincial roads in the province of Groningen. The card arises from legal obligations (of the Environmental Management Act). The dataset should be updated every 5 years. The data present the contours at an observation height of 4 meters. The data refer to the annual average situation in 2021. Traffic intensities are not constant, and interventions can take place on and around the roads, as a result of which the noise load changes. When it comes to small shifts in traffic intensities, this will have little impact on noise levels.

本文件包含2021年格罗宁根省所有省级道路的Lden（昼夜等效声级）等值线，取值覆盖55、60、65、70与75分贝。该数据集直观呈现了格罗宁根省省级道路的噪声污染现状。本数据集的编制依据《环境管理法》设定的法定责任要求，需每5年更新一次。本次数据的声级等值线基于4米观测高度生成，反映的是2021年的年度平均噪声状况。交通流量并非恒定不变，道路及周边区域可实施各类干预措施，上述因素均会导致噪声负荷发生变化。若交通流量仅出现小幅波动，则对噪声水平的影响相对有限。