Bhai but unki baat sahi hai. I know both Ambala Cantt and Ludhiana are big stations aur Ludhiana se ab tak koi train skip nahi karti but ye clone trains end to end passengers ke liye bani hai intermediate ko serve nahi karti to jabardasti UMB aur LDH pe rokna galat hoga. Har halt me 100-200km ka gap maintain kar rakha hai.