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Second round noise mapping – results

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The noise maps show estimated levels of road traffic, railway and industrial noise in our 3 largest urban areas, and noise from the busiest roads and railways across Wales.

Our consultants completed the calculation of the second round of Welsh noise maps in June 2012. We reported these results to the European Commission in December 2012. This was required by the Environmental Noise Directive.

The noise levels in these maps are calculated rather than measured and are based on some assumptions. So the maps should not be relied upon to tell how noisy it really is outside specific properties. The noise maps are being used to help us develop and implement a noise action plan for Wales.

View the maps

You can see the noise maps on our Wales Noise Mapping website (external link).


The method used to produce the noise maps and calculate how many people are exposed to different levels of noise is detailed in the documents below.

Also below is a project technical note that estimates the likely railway noise reductions that will come from electrification.