Staircase Between PF4 & PF5 Is So Narrow.... That It Becomes Difficult To Get Over Or Get Down From FOB When Local On PF1,2,3,4 Or Any Mail/Exp Arrives On PF5.......And This FOB Is The Only Option That Connects PF1,2,3,4 To PF6&7..... For Better Movement They Should Either Extend SUBWAY Of PF1,2,3,4 To PF5,6,7 For Construct New FOB on PF5,6,7 Connecting SUBWAY OF PF1,2,3,4.