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«“√ “√ √“™∫— ≥±‘ µ¬ ∂“π ªï ∑’Ë Û ©∫— ∫∑’Ë Ù µ.§.-∏.§. ÚıÙ¯ 897 ª√’ ¥“ «‘ ∫Ÿ ≈¬å «— ¥‘Ï Systems ans Sustainability. Oxford Univer- sity Press, 2003. Û. √“¬ß“ππÈ ”¡— π‡™◊È Õ‡æ≈‘ ߢÕߪ√–‡∑»‰∑¬. ÚıÙı. °√¡æ— ≤π“æ≈— ßß“π∑¥·∑π·≈– Õπÿ √— °…å æ≈— ßß“π °√–∑√«ßæ≈— ßß“π. Ù. æ®π’ ¬å ¢ÿ ¡¡ß§≈ ·≈– ª√’ ¥“ «‘ ∫Ÿ ≈¬å «— ¥‘Ï . ·π«∑“ß°“√¢π à ß∑’Ë –Õ“¥„π°√ÿ ߇∑æ- ¡À“π§√. «“√ “√√“™∫— ≥±‘ µ¬ ∂“π, ¿“§ ºπ«°, æ.». ÚıÛ˜, Àπâ “ ÒÚ-ÒÒÒ. ı. Prida Wibulswas. Emission from Transport and Mitigation Measures in Thailand. Proc. of the 10 th Int. Pacific Conf. on Automotive Engineering, The University of Melbourne, May 1999, pp. 3-7. ˆ. Koide S., Brooks R. and Vicharangsan T. Regional study on production of fuel ethanol from agro-products. ESCAP, 1982. ˜. ª√’ ¥“ «‘ ∫Ÿ ≈¬å «— ¥‘Ï . °“√æ— ≤𓇙◊È Õ‡æ≈‘ ß ‡À≈«®“°¡«≈™’ «¿“æ ”À√— ∫¿“§¢π à ß„π ª√–‡∑». «“√ “√√“™∫— ≥±‘ µ¬ ∂“π ªï ∑’Ë Ú˜(Ú) æ.». ÚıÙı. Àπâ “ ÙÚ˘-ÙÛÛ. ¯. °≈â “≥√ß§å »√’ √Õ¥ ·≈– ‡®√‘ ≠»— °¥‘Ï ‚√®π- ƒ∑∏‘ . °“√»÷ °…“ ∂“π¿“æ¢Õß«— µ∂ÿ ¥‘ ∫„π °“√º≈‘ µ‡Õ∑“πÕ≈. √“¬ß“π°“√«‘ ®— ¬µà Õ ”π— °ß“π§≥–°√√¡°“√«‘ ®— ¬·Àà ß™“µ‘ æ.». ÚıÙÙ. ˘. ≥— ∞ «√¬» ·≈– ∑π߇°’ ¬√µ‘ ‡°’ ¬√µ‘ »‘ √‘ ‚√®πå . °“√»÷ °…“°“√°≈—Ë π‡Õ∑“πÕ≈¥â «¬· ßÕ“∑‘ µ¬å . √“¬ß“π°“√«‘ ®— ¬µà Õ ”π— °ß“π§≥–°√√¡°“√ «‘ ®— ¬·Àà ß™“µ‘ æ.». ÚıÙÙ Ò. Wibulswas P., Chirachkrit S., Keochung U. and Tiansuwan J. Combustion of Blends between Plant Oil and Diesel Oil. Renewable Energy 16, Pergamon Press, 1999, pp. 1098-1101. Abstract Measures for Reducing Petroleum Fuels in Transport Prida Wibulswas Fellow of the Academy of Science, The Royal Institute, Thailand The highest energy demand among various economic sectors in Thailand has occurred in the transport sector for more than a decade. The demand for fuels in transport is about 70% of the total demand for petroleum fuels of the country. Imported petroleum and products which value more than 10% of the gross domestic products put heavy contraints on finance and economy of the country. Diesel and gasoline account for about 50% and 28% of the petroleum fuels used in transport. Energy conservation measures for the transport sector which should be urgently implemented by the government are, for example, measure on import duties and taxes for more efficient and modern car engines, support on expansions of rail networks for Bangkok and for transport of heavy goods, etc. Natural gas, which is the cleanest fossil fuel and produced mainly in the country, should be the first choice among alternative fuels for use in modified engines and dedicated gas engines. Ethanol as a substitute for MTBE in gasoline should be urgently supported to reach the target set by the national policy as it helps reduce foreign exchange for the import of MTBE and increase incomes of farmers in the country. Development of vegetable oils and biodiesel for compression-ignition engines requires efficient planning for both development of areas for expansion of plantations and of suitable technologies for the oil productions, in order to reach the target in time set by the national policy. Key words : Petroleum Fuels, transportation