Actually it is both..!!
Delhi Sarai Rohilla to Gurgaon [ Normal OHE ]
Gurgaon to Rewari [ High Rise OHE ]
Reason of construction of High Rise OHE after Gurgaon is that :-
There...
more... are two major Container Depots after Gurgaon.. One is at Garhi Harsaru & other one is at Patli..!!
All the double stack containers freight trains Originate & Terminate from these two stations only... so therefore the entire High Rise OHE stretch will be :-
Basai Dhankot [Near Gurgaon] -- Garhi Harsaru -- Rewari -- Narnaul -- Ringas -- Phulera -- Ajmer -- Marwar -- Abu Road -- Palanpur -- Mundra Port (Gujarat)