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 32 km long
आतापर्यंत भारतातला सर्वात लांब बोगदा यांपैकीच एक आहे — ६.५ किलोमीटर लांबीचा कर्बुदे बोगदा.