The Delhi Government has identified five modules of public transport system for the Capital. According to Economic Survey of Delhi 2008-09, it has identified Monorail, Metro, Bus Rapid Transit System, Integrated Rail Bus Transport and Light Rail Transport (LRT) system as the components of a multi-model transit system.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/five-transport-modules-capital
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/pioneer-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/economy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rail-transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/high-capacity-bus
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/light-rail-transit
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mono-rail
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi