Penetrating the mountain ranges to give the track an alignment that was as straight as possible by excavating 92 tunnels, 6 of them being more than two miles [3.2 km] long.
इसके लिए 92 सुरंगे बनायी गयीं जिनमें से 6 सुरंगे 3.2 किलोमीटर से भी लंबी हैं ।