Noise Round 2 Road (Day)

This is a polygon dataset of the strategic noise mapping of roads, which were identified as those roads exceeding the flow threshold of 3 million passages per year, in the form of noise contours for the Lden (day) and Lnight (night) periods for Dublin and Cork agglomerations and the major roads outside of the agglomerations. The Db Value represents the average decibel value during the day time.