Technical or commercial dono reason hai, commercial reason ye hai ki itna loss me chalne waali Rajdhani jiske per trip me Railway ko lakho ka nuksaan hai use thoda accha occupancy mil sake, PPTA raat ko kaafi unsafe or unassailable hai to mostly log isme DNR se hi board karte hai. Agar DNR halt nahi denge to majority of passengers isme ticket book nahi karenge. technical reason ye hai ki PPTA-DNR ''Y'' leg single line hai jisse train ko busy mainline me lane me takleef hoti hai isliye to Sanghamitra rooj reschedule hoti thi PPTA se kyunki washing pit DNR se PPTA jaane me hi use ghanto lag jaate the isliye jab tak line clear nahi hoga ise PPTA se DNR ya DNR se PPTA nahi bheja ja sekta.