ISSUE BRIEF
Bay of Bengal Security Initiative

Bangladesh's Transit Leverage: India's Landlocked Northeast Depends on Dhaka

Inqilab Delta Forum | Bay of Bengal Security Initiative | December 26, 2025

Key Findings

  • The Siliguri Corridor is only 22 km wide — India’s sole land link to 40 million Northeast Indians passes through this vulnerable “Chicken’s Neck” bordered by Nepal, Bhutan, Bangladesh, and Chinese Tibet
  • Bangladesh transit cuts distance by 75% — Agartala to Kolkata via Siliguri is 1,600 km; via Bangladesh it’s 450 km; to Chittagong port just 200 km
  • India needs Bangladesh more than Bangladesh needs India — India’s landlocked Northeast has no alternative; Bangladesh has multiple maritime options
  • Japan’s Matarbari port sits 100 km from India’s Northeast — The $4.6 billion investment is explicitly designed for Indian access, not Bangladeshi development
  • The Agartala-Akhaura rail link was halted in April 2025 — India’s desperate bypass projects reveal Dhaka’s leverage; New Delhi is spending Rs 22,864 crore on alternatives

India’s Geographic Nightmare

On the map of South Asia, India’s Northeast presents an extraordinary vulnerability: seven states and Sikkim, home to over 40 million people, connected to the Indian mainland by a sliver of land so narrow it has earned the ominous nickname “Chicken’s Neck.”

The Siliguri Corridor is the sole terrestrial link between India’s Northeast and the rest of the country. At its narrowest point, it measures just 22 kilometers wide. This strip is:

This geographic reality creates profound strategic anxiety in New Delhi — and profound strategic leverage in Dhaka.


flowchart TB
    subgraph Mainland["Indian Mainland"]
        KOL["Kolkata
Major Port"] end subgraph Corridor["Siliguri Corridor
(22 km wide)"] SIL["Chicken's Neck
Sole Land Link"] end subgraph Northeast["India's Northeast
(40 million people)"] TRI["Tripura"] ASM["Assam"] MEG["Meghalaya"] MIZ["Mizoram"] NAG["Nagaland"] MAN["Manipur"] ARU["Arunachal Pradesh"] end subgraph Bangladesh["Bangladesh Territory"] CHT["Chittagong Port
200 km from NE"] DHK["Dhaka"] end KOL -->|"1,600 km
via Siliguri"| SIL SIL --> ASM ASM --> TRI ASM --> MEG ASM --> MIZ ASM --> NAG ASM --> MAN ASM --> ARU TRI -.->|"200 km
via Bangladesh"| CHT style SIL fill:#ffcccc,stroke:#e31e24,color:#333 style CHT fill:#006a4e,stroke:#333,color:#fff style TRI fill:#f5f5f5,stroke:#333

The Distance Differential: Bangladesh’s Trump Card

The numbers tell the story of India’s dependence:

Via Siliguri
Via Bangladesh
Distance to Kolkata
1,600 km
450 km
Travel Time
30+ hours
10-12 hours
Distance to Port
1,600 km (Kolkata)
200 km (Chittagong)

Distance Reduction via Bangladesh Transit 75%
Cost Savings to Chittagong vs Kolkata Route 85%

"
Goods from Agartala in Tripura have to travel 1,600 km through the Siliguri corridor to reach Kolkata Port instead of just 450 km through Bangladesh, or even better, travel only 200 km to access the nearby port of Chittagong.
World Bank Analysis

This is not a marginal difference — it is a 75% reduction in distance and a proportional reduction in costs, time, and logistical complexity.

Why India Needs Bangladesh More Than Vice Versa

The asymmetry is stark:

India’s Position: Geographic Trap

Bangladesh’s Position: Multiple Options

The fundamental asymmetry: India’s 40 million Northeast citizens have no alternative to Bangladesh transit. Bangladesh’s 170 million citizens have multiple alternatives to Indian engagement.

The Infrastructure India Built — Through Japanese Money

Japan’s massive investment in Bangladesh infrastructure makes sense only when understood as solving India’s problem:

Matarbari Deep Sea Port ($4.6 billion)

The BIG-B Initiative

Japan’s Bay of Bengal Industrial Growth Belt (BIG-B) explicitly aims to:

Roads and Rail

JICA has funded:

The irony: Japan spent billions building Bangladesh’s infrastructure, but designed it primarily for Indian benefit. A sovereign Bangladesh can redirect these investments toward national development priorities.

The Hasina Era: Surrender of Leverage

Under Sheikh Hasina (2009-2024), Bangladesh systematically surrendered its transit leverage:

What Hasina Gave Away

  1. Transit rights through Bangladesh to India’s Northeast — without adequate compensation
  2. Port access at Chittagong and Mongla for Indian goods
  3. Rail connectivity agreements prioritizing Indian access
  4. Transshipment permissions for Indian cargo

What Bangladesh Received

The Agartala-Akhaura railway (inaugurated November 2023) illustrates the imbalance:

India’s Panic: The Bypass Projects

Post-August 2024, India has frantically pursued alternatives to Bangladesh dependency:

Shillong-Silchar Highway (Rs 22,864 crore)

Nepal Route Development

Myanmar Kaladan Corridor

What India’s panic reveals: New Delhi knows it depends on Bangladesh. These Rs 50,000+ crore bypass projects are insurance against a sovereign Bangladesh asserting its leverage.

Bangladesh’s Leverage: How to Use It

The post-August 2024 era offers Bangladesh an opportunity to recalibrate:

Principle 1: No Free Transit

Transit rights are valuable. Bangladesh should extract:

Principle 2: Development, Not Just Transit

Infrastructure should serve Bangladeshi development:

Principle 3: Strategic Balance

Transit leverage should inform broader negotiations:

Principle 4: Diversified Partnerships

Bangladesh should not trade India dependency for any other dependency:

Policy Recommendations for Bangladesh

Immediate Actions (0-6 months)

  1. Comprehensive transit audit: Document all transit arrangements, their terms, and their value
  2. Renegotiation mandate: Authorize Foreign Ministry to renegotiate transit terms
  3. Fee structure development: Establish value-based transit fee framework
  4. Infrastructure review: Assess whether Japanese-funded projects serve Bangladeshi or Indian interests

Short-Term Actions (6-18 months)

  1. Transit agreement revision: Present India with revised terms for continued access
  2. Port capacity assessment: Ensure Chittagong and Mongla can leverage increased transit
  3. Industrial corridor planning: Develop Bangladeshi employment zones along transit routes
  4. Japanese engagement: Reframe JICA projects as bilateral partnerships, not India connectivity

Medium-Term Strategy (18-36 months)

  1. Regional connectivity hub: Position Bangladesh as logistics hub for South/Southeast Asia
  2. Blue economy development: Leverage Bay of Bengal position for maritime economy
  3. Transit revenue optimization: Maximize returns from geographic advantage
  4. Alternative partner cultivation: Ensure no single-power dependency

The Strategic Calculus

India’s Northeast dependency means:

If Bangladesh Cooperates India Gains
Transit access Logistical efficiency for 40 million people
Port access Maritime trade for landlocked states
Rail connectivity Economic development of Northeast
Infrastructure investment Reduced strategic vulnerability
If Bangladesh Restricts India Loses
Transit access 75% longer routes, massive cost increase
Port access Dependence on congested Kolkata
Rail connectivity Decades of development gains
Strategic position Extreme Siliguri vulnerability

Bangladesh holds cards it has never played.

Conclusion: From Supplicant to Strategic Actor

For decades, Bangladesh approached India as a supplicant — grateful for transit arrangements, accepting terms set by Delhi, subordinating its leverage to political alignment.

The geographic reality has always told a different story. India’s Northeast is landlocked; Bangladesh controls the keys. India’s alternatives (Myanmar, Nepal) are expensive, unreliable, and years away. Bangladesh’s alternatives (maritime trade, diversified partnerships) are available today.

The August 2024 political transition creates an opportunity for strategic recalibration. Bangladesh need not become hostile to India — but it must become strategic with India. Transit access should be negotiated, not gifted. Infrastructure should serve Bangladeshi development, not just Indian connectivity. Geographic advantage should translate into policy leverage.

India’s frantic investment in bypass routes reveals New Delhi’s awareness of the vulnerability. Bangladesh’s awareness — and willingness to leverage it — must now catch up.

The Bottom Line

India’s Northeast — 40 million people across the “Seven Sisters” and Sikkim — is connected to the Indian mainland by only the 22 km Siliguri Corridor. Bangladesh transit reduces distances by 75% and is essential for Northeast development. Yet Bangladesh under Hasina surrendered this leverage without adequate compensation. The post-August 2024 era demands recalibration: transit fees reflecting true value, infrastructure serving Bangladeshi development, and geographic advantage translating into policy outcomes. India’s panicked investment in bypass routes (Rs 50,000+ crore) reveals the leverage Dhaka holds but has never exercised.

This Issue Brief represents the analysis of the Inqilab Delta Forum research team.

Sources:

  1. Wikipedia, “Siliguri Corridor,” accessed December 2025.
  2. World Bank, “Bangladesh Corridor Vital to India’s ‘Act East’ Policy,” September 2017.
  3. Observer Research Foundation, “In Search of the Sea: Opening India’s Northeast to the Bay of Bengal,” 2024.
  4. Railway Gazette, “Agartala-Akhaura Cross-Border Link Inaugurated,” November 2023.
  5. Swarajya, “Unlocking India’s North East to Bay of Bengal Through New Transit Agreement with Bangladesh,” 2024.
  6. Swarajya, “New Northeast-Kolkata Sea Route Via Myanmar to Bypass Bangladesh,” 2025.
  7. WION News, “Japan’s FOIP Plan Focuses on Bangladesh’s Matarbari Port,” March 2024.
  8. JICA, “Bay of Bengal Industrial Growth Belt (BIG-B) Initiative,” Project Documentation, 2024.
  9. Press Information Bureau of India, “Agartala-Akhaura Railway Project,” 2023.
  10. South Asia Monitor, “Chill in India-Bangladesh Ties Taking Heavy Toll on Cross-Border Trade,” 2025.
  11. Wikipedia, “Akhaura-Agartala Line,” accessed December 2025.

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