India is a party to UNFCCC (United Nations Framework Convention on Climate Change) and is required to produce the details of the total GHG (Greenhouse gas) emissions in the country called national GHG inventory under national communications and biennial update report. The road transport sector is the largest energy consumer, consequently contributes highest greenhouse gas emissions among transportation system in India. The world globalization and liberalization policies have increased the vehicle population growth nearly 46% from 2011 to 2014. Hence it is necessary to develop a database of emission inventories to design and implement suitable technologies and policies for appropriate mitigation measures. This paper focuses on developing a green gas emissions inventory and elaborating the trends of consequent fuel consumption form road transport sector of India for the period from 2011 to 2014. Finally, compare greenhouse gas emissions estimated based on country specific emission factors with default emission factors. The green gas emissions include major country level emissions such as Carbon Dioxide (CO2), Nitrous Oxide (N2O) and Methane (CH4) emissions and CO2 equivalent. The assumptions and approaches were followed as per Tier 1 and Tier 2 methodologies as mentioned in the 2006 IPCC (Intergovernmental panel for climate change) guidelines for National Greenhouse Gas Inventories. The activity data collected from authenticated sources like published documents of ministries and literatures. In the Tier 1 method, estimation depends on default emission factors as given in guidelines and activity data, whereas Tier 2 method uses country specific emission factor. In the current work country specific emission factors were developed based on C-H-N-S (Carbon-Hydrogen-Nitrogen-Sulfur), corresponding NCV (Net Calorific Value) test results of country specific fuel usage. The CO2 equivalent is the sum total of CO2, CH4 and N2O emitted in terms of their respective global warming potentials (GWP).The estimation of emissions based on default emission factors have revealed that nearly 170.64 Tg of CO2 equivalent were emitted in 2011, increasing to about 199.22 Tg in 2014. Similarly, estimation based on country specific emission factor shows nearly 162.13 Tg in 2011, increasing to about 189.03 Tg in 2014. Hence, it’s been observed nearly 5.11% of reduction in CO2 equivalent using country specific emission factors in the year 2014. Similar trends have also been observed for other gases.