That not an issue. Coz Dhanbad comes in ECR which is not bengal based then why it is not getting trains? (Coz it is Bihar based)
Absolutely no, ECR just cares about mainlines only whether it comes under . Not even mainlines , it cares only about Patna Region (Patna, Ara, Buxar) and Grand Chord and mainlines till Bihar only.
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Malda Division of Bengal is better than these. It's DRM cares about Bhagalpur , Jamalpur (Bihar) together with Divisional HQ Malda Town (West Bengal) itself. Godda/Dumka has political influence, so it gets trains easily and Malda Town has no issue whether those trains will pass through Malda Town or not. They care about its whole division (not the station)
It knows how to handle it's area ( in Bihar, Jharkhand and Bengal)
Political leaders there are too actively participating in demanding of new trains/special trains.
*But the point is that Railway board is neglecting those demands*