Grand Chord ko sabse last me fast section bolkar hi banaya gaya tha.. MGS tak ER hi tha.
Sabse pahli line HWH-DELHi ki via BGP bani thi baad me via JSME line bani aur sabse end me via DHN bani jo electrification ke baad Grand Chord ke naam se jani gayi jisko fast section ke taur par hi banaya gaya tha