Emissions from motorcycles, heavy duty vehicles and all type of vehicles in Hanoi (Vietnam), Chennai (India) and Tehran (Iran), were estimated by the IVE model. The results found that advanced technology significantly reduced air pollutants and GHG emissions emitted from the vehicles [20-22]. Moreover, toxic air pollutants emitted from all vehicle types were estimated by IVE model in Bangkok urban area, Thailand. It was found that by using more advanced vehicle technologies, benzene emissions can be reduced by approximately 2,000 tons per year