KOAA Stn was only launched to start new trains from Calcutta to North / North East India as the congestion level at Howrah and Sealdah Stns has reached threshold level... leave that World Class Theory now ;-D
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PS: This Durgiana Express should be relocated at Howrah and Amritsar Express should be starting from Kolkata-Chitpur (KOAA)... total swapping :-D