HYB is a terminus kind of station sir,similar to mumbai and is very historic..In Erstwhile Nizam State railway in the city, HYB used to be only BG station with DD and KZJ(Via SC) routes while KCG used to be a only MG station connecting NZB-MMR, NZB-/AK/AII and MBNR-KRNT-GTL-UBL and SC used to be a mix of BG and MG..
HYB station has a lot of very old buildings and inhabitants around it and so station extension cant be possible, So only old trains which used to originate there still start from there, and alos HYB is a dead end terminus..Remaining trains originate or pass through SC as it has 10 PF compared to 6 at HYB..
HYB...
more... and SC are only 10 Kms apart..