Reason is more preference towards the Coal Loaded BOXN Rakes which are carrying coal from The Grand Chord Section towards The Thermal Power Plants in Northern India.In Reverse direction,preference is given to the empty wagons for reloading.Also BTPN Rakes carrying Crude Oil & Refined Oil from Numaligarh,Digboi,Duliajan,Barauni & Haldia Refinery in eastern India towards Northern & Western India getting more preference over Janata Exp.