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The Baikal–Amur Mainline (Russian Байкало-Амурская магистраль (БАМ), ''Baikalo-Amurskaya magistral'', BAM) is a broad gauge railway line in Russia. Traversing Eastern Siberia and the Russian Far East, the long BAM runs about 610 to 770 km (380 to 480 miles) north of and parallel to the Trans-Siberian railway. The BAM was built as a strategic alternative route to the Trans-Siberian Railway, especially along the vulnerable sections close to the border with China. The BAM's costs were estimated at $14 billion, and it was built with special, durable tracks since much of it was built over permafrost. Due to the severe terrain, weather, length and cost Soviet premier Leonid Brezhnev described BAM as "the construction project of the century."〔Brown, Dale M. and Mann, Martin, editors. ''Library of Nations: The Soviet Union''. 1985. Time Life Books. Alexandria, Virginia. ISBN 0-8094-5327-4〕 ==Route== The BAM departs from the Trans-Siberian railway at Tayshet, then crosses the Angara River at Bratsk and the Lena River at Ust-Kut, proceeds past Severobaikalsk at the northern tip of Lake Baikal, past Tynda and Khani, crosses the Amur River at Komsomolsk-na-Amure and finally reaches the Pacific Ocean at Sovetskaya Gavan. There are 21 tunnels along the line, with a total length of . There are also more than 4,200 bridges, with a total length of over 400 km (about 260 miles).〔Yates, Athol & Zvegintzov, Nicholas ''Siberian BAM Guide: Rail, Rivers & Road'' (1995, 2nd edition 2001, Trailblazer Publications, England) ISBN 1-873756-18-6 ((see excerpt) )〕 Of the whole route, only the western Tayshet-Taksimo sector of is electrified. The route is largely single-track, although the reservation is wide enough for double-tracking for its full length, in the case of eventual duplication. The unusual thing about the railway is that it is electrified with a 27.5 KV, 50 HZ catenary, which requires rolling stock to be modified for service on the railway. At Tynda the route is crossed by the Amur–Yakutsk Mainline, which runs north to Neryungri and Tommot, with an extension to Yakutsk under construction. The original section of the AYaM connecting the Trans-Siberian at Bamovskaya with the BAM at Tynda is also referred to as the "Little BAM". During the winter the only passenger trains go from Moscow past Tayshet and Tynda towards Yakutsk. Travel time from Tayshet to Tynda is 48 hours.〔http://rzd.ru〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Baikal–Amur Mainline」の詳細全文を読む スポンサード リンク
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