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5DEVELOPMENT OF JAPANESE RAILWAY TECHNOLOGY AND SUPPORT FOR RAILWAY CONSTRUCTION IN UZBEKISTAN
cl https://doi.org/10.24412/2181-1784-2022-22-102-105
KOIZUMI Masayuki
history@mth.biglobe.ne.ip ABSTRACT
Uzbekistan has adopted technologies from China, Russia, Japan, Germany, etc. in the renewal and development of railway facilities. The diplomatic aspect is often emphasized as to why Japanese technology is selected for railway construction assistance in Uzbekistan. However, Japanese railway technology has evolved uniquely even from global perspective. It is necessary to consider how this development process of Japanese railway technology works in the field of support in Uzbekistan. Two examples can be presented regarding the technical features of Japanese railways. First, Japanese railways operate at high frequency on single tracks.
Second, the formation of Japanese passenger trains distributes power to multiple cars (Multiple unit) . In Uzbekistan, electric locomotives tow passenger cars and freight cars (Concentration unit) . The power distribution type (Multiple unit) contributes to high-density operation. In addition, this system is resistant to steep slopes.
However, Japan did not adopt this system in supporting the renewal of the mountain route of Qarshi -Termez. Uzbekistan's railways are built on the premise of a power-concentrated type. This system has the advantage of being able to freely connect passenger cars and freight cars to the rear of the locomotive according to demand.
Japan chose electrification, which is not widely adopted in Japan, according to the railway situation in Uzbekistan. Japan's railway support in Uzbekistan does not simply apply the current situation in Japan, but provides support tailored to the railway situation in Uzbekistan. Keywords: railway facility, railway technology, Multiple unit.
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