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Indian Railways has installed the most advanced Electronic Interlocking System on the Grand Chord route. The measure is towards reducing the travel time between Delhi and Howrah to about 12 hours from the existing 17 to 19 hours. Grand Chord is part of the Howrah-Gaya-Delhi line and Howrah-Allahabad-Mumbai line. It acts as a link between Sitarampur in West Bengal and Pt. Deen Dayal Upadhyay Junction, Uttar Pradesh, and covers a stretch of 450 kilometres falling in North Central Railway Zone. The new Electronic system has replaced outdated 65-year old mechanical signalling system at Tundla Junction in Uttar Pradesh on the route. This interlocking system at Tundla is the second largest in the country after Kharagpur Station in South Eastern Railway.

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