This file contains the contours of Lnight (50, 55, 60, 65 and 70 dB) of parts of provincial roads with more than 3 million vehicle passages in 2021. This dataset shows the noise load of provincial roads in the province of Groningen. The dataset stems from legal obligations (of the Environmental Management Act). The dataset must be updated every 5 years. The data relate to the situation in 2021 and then divide only with more than 3 million vehicle passages in that year. The dataset presents the contours at an observational height of 4 meters.
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