In a city like Delhi, which bears the burden of over 50 lakh vehicles on its roads, using public transport can be a viable option to curb traffic congestion and also a means of reducing expenditure on private vehicles.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/travelling-taxi-cheaper-using-your-car-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/pioneer-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cars
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/taxis
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi