Patipop Amornpanthang creator Dhakal, Shobhakar Chairperson Weerakorn Ongsakul Examination Committee Singh, Jai Govind Examination Committee PEA Scholarship donor AIT education Cooperation Project Scholarship donor Royal Thai Government Fellowship Scholarship donor text series technical report th Pathum Thani, Thailand Asian Institute of Technology 2018 continuing eng 85 leaves : ill. The large scale electric vehicle penetration to road transportation can lead to changing of energy consumption and greenhouse gas emissions, but the number of electric vehicle in Thailand is tiny due to many obstacles. This study has three objectives, the first is to estimate the impact of large scale electric vehicle penetration on oil consumption and greenhouse gas reduction, the second is to assess electricity demand in transportation sector that will be change in the future by using LEAP model, and the third is study on barrier of electric vehicle adoption in Thailand. Penetration rate considered are BAU scenario, 10%, and 45% BEV sand PHEV s penetration. The BAU scenario results, electricity consumption in the future are not much different with present, and demand of fossil fuel such as, gasoline, diesel, LPG, CNG consumption will be substantially increase. The second is 10% penetration, gasoline consumption lower than the BAU in small number due to most of passenger car on road still consume gasoline and PHEV s are powered by electricity and gasoline. The third is 45% penetration, it can lead to the largest effect on energy consumption, demand of oil will decrease in large number, but demand of electricity will be increase in small proportion. Moreover, electricity generation sector can cause of GHG emissions, but government aims to reduce the emissions factor in generation sector by use more renewable energy source for generating electricity. The result show overall GHG emissions is decrease, although number of BEV s and PHEV s increase. For the barriers of electric vehicles adoption in Thailand, researcher was interviewed 27 experts from 10 organization and then use AHP method to rank 12 obstacles which obtain from previous studies. The results that the four most important barrier categorize are market barrier and contextual barrier. In addition, high purchase cost and lack of government incentives are ranked first and second in overall barriers. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Energy Thesis (M.Sc.) - Asian Institute of Technology, 2018 Electric vehicles Energy consumption Power resources Environmental aspects Thailand Greenhouse gas emissions Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B06304 http://203.159.5.9/ait-thesis/detail.php?q=B06304 210210 20260818134533.0