Noise on main roads — Level grid LNight — mapping 2022

The data include the calculation results of the 2022 environmental noise mapping on the main roads outside the agglomerations in Bavaria. These are all motorways, federal and state roads that, according to traffic census in 2019, have a traffic load of more than 3 million vehicles per year. This corresponds to an average daily traffic strength (DTV) of more than 8,200 cars per day. Noise calculations are carried out in accordance with the “Calculation method for ambient noise from near-ground sources (roads, rail, industry and commerce) (BUB)”. The noise indices LDEN and LNight in dB(A) are used as a measure of general harassment or as a measure of sleep disturbance. The LDEN level is an emission level averaged over 24 hours, calculated from the levels Lday, Levening and LNight for the assessment times day (6:00-18:00), evening (18:00-22:00) and night (22:00-6:00). Due to weight factors of 5 dB(A) for the four-hour evening time and 10 dB(A) for the eight-hour night time, the increased noise sensitivity during these times is taken into account. The layer represents the noise pollution on major roads expressed by the LNight noise index in accordance with the EC Environmental Noise Directive.本数据集包含巴伐利亚州城市群外围主干道2022年环境噪声制图计算结果。这些道路均为高速公路、联邦公路及州级公路，根据2019年交通普查数据，其年交通流量均超过300万辆次，对应日均车流量（Daily Traffic Volume, DTV）超过8200辆/日。噪声计算依据《近地面源（道路、铁路、工商业）环境噪声计算方法（BUB）》开展。本数据集采用以dB(A)为单位的噪声指标LDEN与LNight，分别作为整体噪声侵扰与睡眠干扰的评价依据。其中LDEN指标为24小时平均噪声发射级，由日间（6:00-18:00）、傍晚（18:00-22:00）与夜间（22:00-6:00）三个评估时段的Lday、Levening及LNight噪声级计算得出。由于傍晚4小时时段与夜间8小时时段分别设置了5dB(A)与10dB(A)的加权系数，以此体现该时段内人体对噪声敏感度的提升。本数据图层依据欧盟（European Commission, EC）环境噪声指令，以LNight噪声指标表征主干道沿线噪声污染状况。