Metro rails are under construction in Delhi, Mumbai and Bengaluru. Smaller urban centres are also drawn to it. It is fashionable to place metros in city planning and budgets. Invariably, a coterie of engineers, bureaucrats and ministers make such public transport choices.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/skewed-track
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-planning
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-environment-and-forests-moef
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangalore-t
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-impact-assessment-eia
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/metro
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport