You can't even imagine how much capital MB produces everyday. And in comparison with your list Ambala, Saharanpur and Ghaziabad each one of them has special privilege of having trains to almost every part of the country. When a city like MB doesn't hold a geographical position through which it can get passing trains to different parts of the country then the need of originating trains from that particular station arises. E.g. Ala Hazrat Exp, Triveni exp from BE.
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Government isn't only to serve capitals, tourist destination its to satisfy the...
more... needs of the people of every region irrespective of its importance. At this point I strongly support that MB needs trains on its own name to cities like Mumbai, Bangalore and Chennai. And sir we don't want any originating trains to Kolkata, Guwahati, Amritsar, Chandigarh etc.