Specific steps taken by the Government with respect to vehicular pollution inter-alia include introduction of cleaner / alternate fuels like gaseous fuel (CNG, LPG etc.), ethanol blending; universalization of BS-IV by 2017; leapfrogging from BS-IV to BS-VI fuel standards by 1st April, 2020;promotion of public transport network;collection of Environmental Protection Charge on more than 2000 CC diesel vehicles; notification of graded response action plan for Delhi and NCR and issuance of directions under Section 18(1)(b) of Air (Prevention and Control of Pollution) Act, 1981 and under Section 5 of Environment (Protection) Act, 1986 which comprises of specific directions on control of vehicular emissions such as steps for retrofitting of diesel vehicles with particulate filters, installation of vapour recovery system in fuelling stations, installationof remote sensor based PUC system, promotion of battery operated vehicles, action plan to check fuel adulteration, improvement of infrastructure for decongestion of roads etc.
Source: http://www.indiaenvironmentportal.org.in