Nathula To Tsomgo (18.1 KM)- Open
Tsomgo To Gangtok (34.5 KM)- Open for light vehicle only.
Gangtok To Mangan (68 KM)- Blocked at Km. 49.3. Not Needed
Mangan To Chungthang (27.5 KM)- Blocked at Km. 17.8. Not Needed
Chungthang To Lachung (27.8 KM)- Open
Lachung To Yumthang (23.63 KM)- Open