This study will make a first attempt to apportion each major type of urban air pollution (CO, NOx, particulates, HC, etc.) in Dhaka by the types of vehicles that emit them. It will provide estimates of the annual emissions of each major pollutant from each vehicle type using estimates of each vehicle type's average emissions per kilometer of travel, and the annual number of kilometers traveled. It will also provide estimates of the relative contribution from different vehicle types in terms of providing transportation 'services to the inhabitants of Dhaka, i.e. moving people and the emissions of pollutants per passenger kilometer traveled. Finally, it will provide some initial estimates of the impact of selected vehicle-related policies on emissions. This will focus on policies that attempt to shift travel from one mode to another (such as from baby taxis to busses) and will estimate the impacts of these policies on the total level of emissions in Dhaka.
The analysis will provide estimates of numbers of vehicles, VKT and emissions perkilometer for all the major vehicle types in Dhaka, and for each major type of pollutant. Once basic results are obtained scenarios regarding future traffic growth and policies that impact travel and vehicle numbers can then be tested for their impacts on emissions.
It should be noted that the estimates of emissions per kilometer for each vehicle typewill be based on studies of vehicle emissions from other countries including Eastern Europe, Taiwan, and India. In the future vehicle-based emissions testing should be conducted in Dhaka to gain a more accurate picture of the emissions that Occur from the specific vehicles in this city.