I do not know if any one has really seen this train travelling above 120+ Km/Hr... All videos in You tube for this train shows speed of 100+ something in high speed zone between Howrah to Khana Jn. As a matter of fact it has a unscheduled halt before entering Dankuni Jn and before Bardhaman Jn [Going towards NJP] which is around 5 - 10 min... Rest from Dankuni to Bardhaman it goes with a modest speed... I think its nothing more being a Shatabdi with WDP 4B/4D engine and LHB rake... Even Patna Jan Shatabdi which has close timing schedule with this train. runs with same speed as this train and gets more priority then this train...
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High speed actions in High speed zone from Howrah towards Bardhaman via Dankuni is good for premium train like Rajdhani & Duronto for Delhi route... Rest as the track is good overall train runs at modest speed if not given an unscheduled halt...
I have travelled in this train but not seen any high speed action...