The auto-rickshaw has become a predictable part of the everyday lives of Indian city-dwellers. Although this popular means of public transport provides relatively discounted and efficient transportation, the auto-rickshaw is a key source of soot that causes particulate air pollution. These soot emissions infringe the natural cycles of the atmosphere other than their more overt effects on human health. Consequently, their entrapment becomes vital. Though most particulate filters provide a rather good efficiency, once clogged an undesired back pressure may lead to engine and/ or filter failure. Through this study a method is proposed to overcome such impenetrability. Once the particles are confined to narrower streams, smaller filters may be used which even if clogged will allow the easy passage of the exhaust gases out of the exhaust pipe. The most immediate outcome of this research is that the CFD simulations suggest inexpensive design alterations in the diesel particulate filter which can be fabricated easily. With government subsidies this component can be mass manufactured for use in India and other Asian countries where auto-rickshaws are widely used.