Siliguri Corridor

Also called: Chicken's Neck · Topic: India and her Neighbours · NCERT: Beyond NCERT

Meaning

The Siliguri Corridor, also called the Chicken's Neck, is a narrow strip of Indian land in north West Bengal, about 20-22 km wide at its narrowest point. It lies between Nepal (west) and Bangladesh (south and east), with Bhutan just to the north. It is the only land link between the North-East (eight states) and the rest of India. All the region's roads, railways, pipelines, power lines and optical fibre cables pass through it.

Explanation

How the "neck" was formed

• Cause: the borders of the countries around it.
• Nepal presses in from the west.
• Bangladesh presses in from the south and east.

• Bhutan sits just to the north.

• Result: Indian land is squeezed into a thin strip. The strip lies around the city of Siliguri, in the Darjeeling and Jalpaiguri districts of West Bengal.

• On a map, the North-East looks like a head joined to the main body of India by a thin "neck". This is why it is called the Chicken's Neck.

What passes through it

• National highways: road links to Assam, Sikkim and the other North-Eastern states.
• Railway lines: the only rail route over Indian land into the North-East.
• Oil and gas pipelines, power lines and optical fibre cables (thin glass cables that carry internet and phone data).
• The risk: if the corridor were blocked by war, floods or unrest, the North-East would be cut off from the rest of India by land.

The threat from the north: Chumbi valley and Doklam

• Chumbi valley: a narrow wedge of Tibet (China) that pushes south between Sikkim (west) and Bhutan (east).
• The Nathu La and Jelep La passes lead into it from Sikkim.

• Its southern tip points straight at the Siliguri Corridor. That is why it is called a "dagger" aimed at India's weakest point.

• Doklam: a plateau (high, flat land) near the India (Sikkim)–Bhutan–China tri-junction (the point where three countries' borders meet).

• Cause: in June 2017, China tried to change the status quo by building a road into the Doklam area [3].
• Process: Indian troops stepped in to support Bhutan. Indian and Chinese troops then faced each other for 73 days.
• Result: both sides pulled back on 28 August 2017 [2].
• Why it matters for the corridor: a road on Doklam would let China look down on the Siliguri Corridor and move towards it quickly.

Ways to reduce the risk

Some of these are still in progress, so check their current status.

• Transit through Bangladesh: road, rail and river routes, and the use of Chittagong and Mongla ports.
• The Kaladan Multi-Modal Transit Project through Myanmar. "Multi-modal" means it uses more than one kind of transport, such as sea, river and road.
• New rail and road links into the North-East and Bhutan. An example is Kokrajhar (Assam) – Gelephu (Bhutan), a 69 km line [1].
• Inland waterways on the Brahmaputra, such as the Jogighopa terminal in Assam [1].

Where it occurs

• State: West Bengal, in its northern part, around Siliguri in the Darjeeling and Jalpaiguri districts.
• Neighbours around it: Nepal to the west, Bangladesh to the south and east, and Bhutan just to the north. The Chumbi valley (Tibet, China) lies further north, between Sikkim and Bhutan.
• Regions it joins: the rest of India on one side and the North-East (eight states) on the other.
• Bypass routes:
• Through Bangladesh, using the Chittagong and Mongla ports.
• Through Myanmar, using the Kaladan project.

• Along the Brahmaputra waterway, through Jogighopa, Assam [1].

• Nearby new links with Bhutan: the MoU for the first India-Bhutan rail links was signed on 29 September 2025 [1].

• Kokrajhar (Assam) – Gelephu: 69 km.
• Banarhat (West Bengal) – Samtse: 20 km. This line is in north Bengal, the same area as the corridor.

Don't confuse with

• Chumbi valley: this is Chinese (Tibetan) land between Sikkim and Bhutan that points towards the corridor. The Siliguri Corridor is Indian land in West Bengal.
• Doklam: this is a plateau claimed by Bhutan and China, not by India, near the Sikkim tri-junction. The Siliguri Corridor is undisputed Indian territory to the south of it.
• Kalapani-Lipulekh-Limpiyadhura: this is the India-Nepal-China tri-junction in Pithoragarh, Uttarakhand, and it is a border dispute. The Siliguri Corridor is not disputed. It matters because it is narrow.
• Sikkim / Assam: the corridor is not in Sikkim or Assam. It lies wholly in West Bengal.

Prelims Hooks

• Siliguri Corridor: about 20-22 km wide at its narrowest, in West Bengal, between Nepal (west) and Bangladesh (south and east). Bhutan lies just to the north.
• Trap: the corridor is in West Bengal, not Sikkim or Assam. West Bengal and Sikkim are the two states that border both Nepal and Bhutan.
• Chumbi valley = Chinese wedge between Sikkim (west) and Bhutan (east). The Nathu La and Jelep La passes lead into it. Its tip points at the Siliguri Corridor.
• Doklam standoff: China built a road in June 2017 [3]. The standoff lasted 73 days and ended on 28 August 2017 [2]. Bhutan and China claim Doklam, not India.
• Corridor bypasses: Chittagong and Mongla ports (Bangladesh), the Kaladan project (Myanmar), the Jogighopa waterway terminal on the Brahmaputra (Assam) [1], and the Kokrajhar–Gelephu rail line [1].

Mains Points

• One weak point for a whole region (GS-III): every road, rail line, pipeline, power line and fibre cable to the eight North-Eastern states runs through a strip only 20-22 km wide.
• A block caused by war, floods or unrest would cut the North-East off by land.

• This affects supplies, the economy and the movement of troops.

• China's pressure near the corridor (GS-III): the Chumbi valley points at the corridor like a "dagger".

• China's road-building at Doklam in 2017 [3] showed how a neighbour can push towards it.

• India's support to Bhutan in the 73-day standoff shows that Bhutan's security is linked to India's own security.

• Policy response: other routes (GS-III):

• Transit through Bangladesh (road, rail, river, and Chittagong and Mongla ports).
• The Kaladan project through Myanmar.
• Brahmaputra waterways such as Jogighopa [1].
• New rail links with Bhutan, such as Kokrajhar–Gelephu [1].
• Stronger border infrastructure.
• Together, these reduce India's dependence on a single land link.

Related concepts

• India-Nepal border
• India-Nepal Treaty of Peace and Friendship
• Kalapani-Lipulekh-Limpiyadhura
• Mahakali Treaty (1996)
• India-Bhutan relations
• Doklam
• Chumbi Valley

Read more

• Nepal and Bhutan: the Himalayan kingdoms and the Siliguri Corridor