Siliguri Corridor: Indian Railways to build underground rail-road tunnel in Chicken’s Neck
Indian Railways is planning a massive underground rail-road tunnel in the Siliguri Corridor, popularly known as the Chicken’s Neck. This strategic project aims to secure connectivity to the North-East states and ensure that train movements remain uninterrupted even during crises. The project was mentioned by Railway Minister Ashwini Vaishnaw following the February 2026 budget.
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What are the key details of the Siliguri underground project?
The project will be built between Rangpani and Bagdogra, covering a distance of approximately 35 km. It is designed as a dual-use tunnel for both railways and road traffic. The estimated cost of this infrastructure is ₹11,600 crore, with a target completion time of 4 years. The tunnel will be located about 20-24 meters below the ground level.
| Feature | Details |
|---|---|
| Route | Rangpani – Bagdogra |
| Length | 35 KM |
| Usage | Rail + Road Tunnel |
| Estimated Cost | ₹11,600 Crore |
| Timeline | 4 Years |
| Depth | 20-24 Meters |
How will this project benefit North-East connectivity?
The underground network will protect train movements from enemy threats and natural disasters. It will speed up the movement of the Indian Army and ensure a resilient supply chain. Additionally, the existing double-line section will be upgraded to a four-line overground corridor, effectively creating six railway lines in this sensitive zone. This integration will also help logistics between the Bagdogra Air Force Station and Bengdubi Army Cantonment.
Frequently Asked Questions (FAQs)
What is the main purpose of the Siliguri underground tunnel?
The main purpose is to ensure secure and uninterrupted rail and road connectivity to the North-East states, protecting the strategic Chicken’s Neck corridor from security threats and disasters.
Which technology will be used for the tunnel construction?
The project will use Tunnel Boring Machine (TBM) methods with NATM tunnels for crossovers and a 2×25 kV AC electrification system.