Data shows noise due to traffic during the day is much higher than what is good for general public
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/capitals-noise-levels-exceed-limits
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi