1. Catalonia has developed strategic noise maps and action plans for 10 agglomerations with populations over 100,000 as required by the END. 2. Strategic noise maps show noise levels across areas and are used to estimate the number of people exposed to different noise levels. Maps were developed using measurements and GIS tools to overlay noise and population data. 3. Action plans developed for the first round focused on improving noise in the most exposed areas. Future plans will also consider quiet areas and involve road/rail authorities and local governments long term.