aapka kahna bilkul sahi hai, sabhi zones / divisions karte hain beimaani dusri zone k trains k sath.
aapne jo example diya hai na 12391 ka, DNR walo se woh kabhi right time na chal paati hai.
2 baar slack ki wajah se MGS / BSB right time ho jaati hai, aur kuchh nahi. Aur late hoti hai tabhi loop hoti hai 12142 aur 12792 etc k liye.
wahan...
more... logic ye apply hota hai ki unke stops kam hain 12391 se.
12402 aur 12392 k stops dekhiye, shayad koi difference nahi hai DNR to FUT.
Jis platform pe 12402 rukti hai, usi se 12392 bhi ruk k jaati hai.
isliye maine bola ki ye precedence bilkul hi justified nahi tha, 2:30 hours late 12402 finally 6 hours late karwa di, 12392 already 7:30 hours late this aur RGD tak 7:30 hours hi late rahi.