Emergency Window - RailFans love it. Why? Go figure. - Anubharadwaj Maharshi

Hisar Jn , a major junction connecting
Hisar to Mumbai (via Churu-Medta Road-Ju)
Hisar to JammuTawi (via Jakhal-Dui-Ludhiana)
Hisar to Rewari (via Bhiwani)
Hisar to Bathinda ( via Sirsa)
Hisar...
more...

to Delhi (via Bhiwani)
Hisar to Delhi ( via Hansi -Meham) (under progress)
And also a major junction for WDFC (western dedicated freight corridor) connectin DFC to Ludhiana
Electrification of HSR-RE , HSR- LDH & HSR-BTI is senction.
So my point is that there sud be a Eloco shed at the junction in the future as here loco reversal is also for many trains and cud be loco change too .
I want to know that factors make railway promised for a loco shed at a Junction