ERS starting at night is OK. Can be re-routed via KJM, because in the mornings, SBC/ YPR will be overflowing with trains and passengers. So, the long distance train can avoid entry into the city and also avoid loco reversal. KJM is handling all trains towards Chennai/ Kerala on daily basis and and even Mumbai / Interior TN (4 days a week). Can definitely handle one more train, which will be useful for traverllers.
Since IT pax is the main crowd, pl provide stop at Whitefield WFD. Lot of techies work in and around WFD and demand is genuine.
SA...
more... - KJM can be little above 4 hours considering WFD stop and daytime run in that stretch. KJM-KCG in 11 hours via single track in YNK-GTL is tough.
Anyway, total distance ERS-KCG can be covered in 22-23 hours.