Since this specials are being run on the slot of Nagaon Express, this train for Dhanbad could have been run via TATA, ASN route.
The trains bound for BJU are already catering to RNC or a dedicated special can be run upto RNC rather!
It is preposterous that no specials for DHN are run via ASN inspite of the shorter and faster route and the convenience of ASN DGR DHN being 3 big towns within a 100 km radius. Running a DHN bound special will be beneficial for the overall Shilpanchal Area.