HI agree with your point....i just want to add to it few more...
The Tkpr-llh route has a 1st crossing just near Tikiapara emu carshed to enter SER main HWH-SRC route.....then 2nd crossing is after the emu carshed towards SRC end to enter the middle line of HWH-SRC route...... now there lies the problem..... when a train enters from liluah side to tkpr ...the down train from Santragachi side towards Howrah has to be stopped at Tikiapara stn till the rake enters 2nd line near tkpr emu carshed..... then agar that rake enter the middle line at tkpr emu carshed end to middle line....and then continues to run till SRC on that middle line...... now that middle line is very busy always...
more... as it is used by mail/ express/, sf trains comming from Src side going towards Howrah stn also that line is used to bring empty rakes of express train from SRC CDO towards Howrah. As a result this train will also get late as it will be detained to enter SER....then add the other point that you said on it was correct. So to pass 1 train from liluah side to Santragachi...many other trains has to be detained or will get late.....it is not possible at all......some goods trains goes by that route but they r made to wait for clearance......but an express train or premium train like humsafar cannot bd kept waiting for clearance for long....
As i heard from someone in comming days based on operational data of this Humsafar...some more Northeast to South and West India bound trains will be diverted via Dankuni-Andul route bypassing Howrah stn to decongest Howrah station.