Shatabdi is short distance train which return to starting point on same day ... it is not possible for Yesvantpur
Sampark kranti is possible from delhi as SK join national capital to main cities of state
A humsafar is possible , howrah humsafar can be extened to agartala
theoretically duranto is possible but due to not enough end to end passenger , will not...
more... be viable.
A weekly/biweekly superfast or express train will be good