National Highway 31A connects Sivok in
West Bengal with the capital city of
Sikkim,
Gangtok. This highway starts at the junction with National Highway 31 at Sivok and travels northwards for 30 km, before entering Sikkim at
Rangpo. Those venturing to
Darjeeling and
Kalimpong need to turn west and east respectively at the respective points on the National Highway 31A. In Sikkim, National Highway 31A traverses 62 km, before terminating at Gangtok; Ratong is situated on the highway.
