NR sabkuch kar sakta hai..Ek baar Poorva NR mein Patna Rajdhani ko OT karli thi..apni trains Magadh,Mail,Kaifiyat etc. ke pyar mein andha NR..:-P
I think NR mein wohi old conventional rule hai ki late running train chahe koi bhi ho,usse shunt kar do..But NCR mein MPS,stoppages wagerah se priority banti hai joki logical bhi hai..