जिंदगी में शादी के अलावा ट्रेन में RAC ही एक ऐसी स्थिति है,जिसमें दो अजनबी साथ निभाने को मजबूर होते है। - Junaid

On 9th Feb(i.e.,Thurs,the Originating Day for Vivek Exp from Santragachhi),I was in HWH station.My train was 12663 HWH TPJ Exp upto Korukkupettai.Our train left at 16:10 from PF #23.Prior to that 12833 was stationed @ PF#23,which eventually got sided @ 15:15.Beside that PF#22 was vacant all along after 12842 Coromandel Exp left @ 14:50.The other days',it could've been occupied by 12246 Duronto Exp which reaches from Yesvantpur @ 16.00.But the interesting story is On Wednesday there isnt any Duronto from YPR,which would reach HWH on Thurs.So PF#22(capable of handling 26 coaches) remains unutillized for a long period of time.
Even if we assume that 12246 could've further extended its Day of Operations & eventually run as a Daily Train,still absolutely No problem.Because...
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Mangalore Vivek Exp is scheduled to reach KGP @ 17:30,so if introduced it should leave HWH @ 15:50,i.e.,20 mts ahead of Tiruchirapalli Exp & thus Duronto can enter PF#22 @ 16:00 without any problem from the Down Route.
PS:-PF#22,23 are never utillized for either Eastern Rly Trains/SER MEMU's.So couldn't it be extended till HWH?