In the second phase of construction, this line will be extended till Gangtok, the capital of Sikkim, and later to the Nathu La pass, along the border with Tibet.

It passes through villages and towns like Kalijhora, Birik daara, Lohapul, Rambi Bazar, Gailkhola, Teesta Bazaar, Chitrey, Melli, Kirnay, Tarkhola, Chanatar, Rangpo and Khanikhola, Majitar, Rangpo.

[citation needed] The track is due to be constructed through the foothills of the Kanchanjungha mountain range and the Teesta river valley.

New railway stations will be constructed at Melli, Teesta Bazaar, Geil Khola, Riang, and Rangpo.

The railway line will help troops and armaments move faster towards the Indo-Tibet border.