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Transcripción del abstract original del autor: Saibu Gas Co., Ltd. has been supplying LNG (Liquefied Natural Gas) by LNG tank trucks to Sasebo, Kumamoto areas in Kyusyu-Island that are parts of the gas provision areas of Saibu Gas. Total volume of LNG transportation approximately amounts to 63,000 of LNG ton per year, which requires totally 6,900 of LNG tank trucks per year (FY2003). In preparation for increasing transportation volume of LNG, the Tank Truck Management Room was established at Fukuoka LNG terminal of Saibu Gas in order to streamline the jobs related to security of LNG tank truck transportation, and to strengthen security system of Fukuoka LNG terminal for the preparation of accidents. Although we have intended to strengthen security system of LNG tank truck transportation, the way of reporting traveling conditions (its location, its condition; traveling or stopping, etc) of LNG tank truck on the road has been only limited to driver’s mobile phone. Then, aiming at reducing driver’s obligation to report an accident when it happens and being able to inform the staff of the Tank Truck Management Room of the tank truck’s traveling conditions automatically replacing the injured driver, an organized security system that can immediately and accurately grasp the occurrence of any abnormalities such as collision, sudden stop, liquid leakage, etc. at the Tank Truck Management Room has been required in recent years. Saibu Gas Co., Ltd. has jointly developed a security system of LNG tank truck transportation with Japan Radio Co., Ltd. and Saibu-gas Information System Co.,Ltd. The security system enables the Tank Truck Management Room to monitor the traveling conditions of the tank truck on the road and to grasp the occurrence of any abnormalities .