Noise levels have been monitored at selected locations of Delhi and Roorkee, viz. Rithala (Delhi), Panchsheel Enclave (Delhi), New Friends Colony (NH-2 Delhi) and Gurudwara (NH-73, Roorkee) along with observations of traffic volume, speeds and other geometrical parameters.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/evaluation-and-design-noise-barriers
[2] http://admin.indiaenvironmentportal.org.in/category/author/u-v-hanuman
[3] http://admin.indiaenvironmentportal.org.in/category/author/m-parida
[4] http://admin.indiaenvironmentportal.org.in/category/author/m-p-s-chauhan
[5] http://admin.indiaenvironmentportal.org.in/category/journal/indian-journal-air-pollution-control
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttaranchal-uttarakhand
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/noise-pollution-control
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution