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.
તેમ જ, અનેક સ્થળે પહાડો તોડીને ૨૮ મીટર પહોળો માર્ગ બનાવ્યો.