EU Directive 2002/49/EC, transposed into Irish law by Statutory Instrument number 140 of 2006 (the ‘Environmental Noise Regulations 2006'), calls for the development of strategic noise maps and action plans for major roads, railways, airports and cities.

Under the Regulations, TII is responsible for the development of noise maps for all national roads carrying in excess of 3 million vehicles a year.

For the 2012 phase of noise mapping, strategic noise maps were developed for just over 3000 km of national roads. Additional noise maps were also developed for major non-national roads. The website displays noise maps for major roads outside the agglomerations of Dublin and Cork. These maps were developed by the Authority in 2012.

Visualisations are available here - http://nra-gis.maps.arcgis.com/apps/Compare/Configure/index.html?appid=0a26a9dd79fd44a68dd90f5445449701