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Project Unigauge is an ongoing exercise by Indian Railways to standardise most of the rail gauges in India to broad gauge. Indian Railways currently has significant lengths of four different gauges: the broad gauge, the metre gauge, and two narrow gauges and . The total length of track used by Indian Railways was about while the total route length of the network was in 2011. Urban mass rapid transport systems (metro rail) built or being built in six large cities in India use both broad gauge and standard gauge. However these metro railways are independent corporations not under the jurisdiction of Indian Railways and therefore Project Unigauge does not apply to them. A broad-gauge network allows bigger trains, higher speeds, and more stability. However, it costs more than smaller gauge. For India, which has one of the world's highest population densities, broad-gauge allows comfortable travel for high volumes of travellers, and is deemed to be economically feasible in the long term. Adopting Broad-gauge has helped India to have one of the lowest ticket prices in the world. Cheap train travel cost is achieved with more tickets per train, lower operational costs than standard gauge, double decker passenger trains, double decker cargo trains without any special provisions. Even Triple decker trains are also proposed with non-standard container sizes.. == History == It was observed for a long time that towns and cities on the metre gauge (MG) and narrow gauge (NG) lines had a poorer service than equivalent towns on the broad gauge system, the speed of trains was slower and the freight traffic (ton per kilometre) on metre gauge tracks was only a small fraction of the freight traffic on broad gauge tracks. It was decided that conversion of metre and narrow gauge railway lines to broad gauge would make Indian Railways more efficient, avoid the current breaks of gauge, increase the freight-carrying capacity and shorten the routes with many regauged links. Some sporadic conversion of metre gauge railway tracks to broad gauge such as Bangalore-Gooty and Pune-Miraj had taken place from 1971 to 1990 but metre gauge railway tracks (such as Mangalore-Hassan through the Western Ghats for a Kudremukh iron ore project) continued to be laid in that period because of cost considerations. Project Unigauge started in 1990–91 in earnest. The first routes taken for conversion of gauge were Jaipur-Sawai Madhopur, Delhi-Rewari, Mahesana-Viramgam and Chhapra-Aunrihar. 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「Project Unigauge」の詳細全文を読む スポンサード リンク
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