Connectivity and Chokepoints for UPSC: INSTC, Chabahar, IMEC, BRI, CPEC, Hormuz, Suez, Malacca and India's Ports
How UPSC Tests Connectivity
🎯 Exam priority: Tier-1. UPSC asked: the INSTC (2025); the Sumed pipeline and the Red Sea (2024); India's East-West Corridor, the Trilateral Highway and the BCIM corridor (2023); the Belt and Road Initiative (2016); which countries' ships must cross the Strait of Hormuz (2026, provisional key); and which India-ASEAN connectivity projects are real (2026, provisional key).
Connectivity questions ask where a route starts and ends, who built it and which chokepoint it avoids or uses. This note has four boxes: the corridors, the chokepoints, India's eastern links and ports and bases.
The Corridors: INSTC, Chabahar, IMEC, BRI and the Eastern Links
These are the corridors UPSC has used.
The big corridors
Corridor | Route and facts | Status (secondary sources where marked) |
International North-South Transport Corridor (INSTC) | Ship, rail and road route from India (Mumbai/Nhava Sheva) to Iran (Bandar Abbas and Chabahar) across the Caspian to Russia and on to Europe, with an eastern branch to Central Asia; launched by India, Iran and Russia in 2000; shortens transit time and cost against the Suez route. India is a founding member (2025 PYQ: 'India to Central Asia to Europe via Iran') | The MEA used Chabahar and the INSTC as its connectivity offer to Central Asia in 2025. The missing rail link is Rasht-Astara in Iran |
Chabahar Port (Iran, Gulf of Oman) | India's only overseas port operation: India Ports Global at the Shahid Beheshti terminal; a 10-year contract signed in May 2024; a gateway to Afghanistan and Central Asia that avoids Pakistan | The US revoked India's sanctions waiver in September 2025 and then allowed IPGL to operate until 26 April 2026; the position after April 2026 is unclear |
India-Middle East-Europe Economic Corridor (IMEC) | Announced at the G20 Delhi summit (September 2023) by India, the US, Saudi Arabia, the UAE, the EU, France, Germany and Italy: an eastern leg from India to the Gulf by sea and a northern leg across the Gulf and Israel to Europe by rail and sea | A framework only; progress slowed after October 2023. The first technical meeting of IMEC stakeholders was held in New Delhi on 5-6 August 2025 |
Belt and Road Initiative (BRI), 2013 | China's global network of road, rail, port and energy projects; CPEC runs from Kashgar to Gwadar through Pakistan-occupied Kashmir, which India opposes; India has stayed out of the BRI | 2016 PYQ: BRI belongs to China, not the EU, AU or Brazil |
Trilateral Highway (IMT) | Moreh (Manipur) through Myanmar to Mae Sot (Thailand), about 1,360 km; the MEA noted technical documentation on a 52-km first phase in October 2025 | Incomplete |
Kaladan Multi-Modal Transit Transport Project | Kolkata-Sittwe by sea, Sittwe-Paletwa by the Kaladan river and Paletwa to Mizoram by road; India's route to the north-east around Bangladesh | Part of India's USD 2 billion portfolio in Myanmar |
Agartala-Akhaura rail link | India-Bangladesh rail, built with Indian grant assistance; handed over in June 2024 and formally completed in July 2025 | Bangladesh is not an ASEAN member (2026 PYQ) |
The World's Chokepoints
These are the world's chokepoints and what UPSC could ask about each.
Straits and canals
Chokepoint | Joins / between | Why it matters |
Strait of Hormuz | Persian Gulf and Gulf of Oman; Iran and Oman | About a fifth of seaborne oil and LNG; ships from Bahrain, Kuwait, Qatar and Iraq must pass it (2026); closed or attacked in the 2026 war |
Bab-el-Mandeb | Red Sea and Gulf of Aden; Yemen, Djibouti, Eritrea | Houthi attacks pushed ships round the Cape |
Suez Canal and the Sumed pipeline | Mediterranean and Red Sea; Egypt | The shortest Asia-Europe sea route; the Sumed pipeline links Ain Sukhna on the Red Sea to Sidi Kerir on the Mediterranean and carries Gulf oil to Europe (2024) |
Strait of Malacca | Andaman Sea and South China Sea | India's trade lifeline to East Asia |
Sunda and Lombok straits | Java Sea and Indian Ocean (Indonesia) | Alternatives to Malacca for large ships |
Taiwan Strait | East and South China Sea | A major flash point |
Bosporus and Dardanelles | Black Sea and Mediterranean; Türkiye | Montreux Convention (1936) |
Bering Strait | Arctic and Pacific; Russia and Alaska | The date line (2025 PYQ) |
Panama Canal | Atlantic and Pacific; Panama | US interest in the canal in 2025 made it a news item |
Northern Sea Route (Arctic) | Along Russia's Arctic coast | Shorter Europe-Asia route as ice melts; India-Russia signed an agreement on polar waters in December 2025 |
The Red Sea is a dry sea: very little rain and no rivers flow into it (2024 PYQ).
India's Ports and Strategic Locations
India's footprint in the Indian Ocean is built from ports, airstrips and naval access.
India's ports and strategic locations
Location | India's interest |
Chabahar (Iran) | Operates the Shahid Beheshti terminal through India Ports Global |
Sittwe (Myanmar) | Port at the sea end of the Kaladan project |
Agalega Islands (Mauritius) | Airstrip and jetty built with Indian help; part of the Mauritius partnership upgraded to an Enhanced Strategic Partnership in March 2025 |
Duqm (Oman) | Indian Navy access and visits (a three-ship port call on 31 August-1 September 2025); Oman CEPA concluded in December 2025 |
Trincomalee (Sri Lanka) | Energy hub with Sri Lanka and the UAE |
Colombo (Sri Lanka) | Indian companies operate a container terminal; Hambantota, by contrast, was leased to a Chinese company for 99 years in 2017 |
Seychelles and Maldives | Maritime cooperation and capacity-building; India built the Maldives defence ministry building, opened in 2025 |
Bahrain | Headquarters of the 47-member Combined Maritime Forces, which India joined in 2023 |
2025 events
India Maritime Week 2025 (27-30 October, Mumbai) hosted ministers from several countries and the first Quad Ports of the Future Partnership Conference.
A Quad table-top exercise on the Indo-Pacific Logistics Network was held in Hawaii (28 April-2 May).
Further Reading
the Ministry of External Affairs Annual Report, MEA and PIB press releases and joint statements, United Nations and treaty-body websites, and an atlas — the primary sources behind every fact above.
How UPSC Could Ask This Next
Here are the questions this chapter is most likely to produce next.
How UPSC could ask this next
Route definition: 'INSTC connects India to Europe via ...', 'IMEC connects India with ... through ...', 'the Trilateral Highway connects Moreh with ...'.
Chokepoint geography: which countries' ships pass which strait; which strait links which seas.
Statements on BRI and CPEC: India's objection through PoK, Gwadar, Hambantota, Djibouti.
Counts: 'how many of these projects involve ASEAN members' (Kaladan, IMT: yes; Agartala-Akhaura: no).
Mains: Chabahar and sanctions, IMEC as an alternative to the BRI, the Ashgabat Agreement and Central Asia (2018), and the Hormuz energy shock.
Test Yourself: Practice Questions and PYQs
Twelve practice questions on corridors, chokepoints and India's ports, followed by the real UPSC Prelims questions and exact Mains questions.
Practice Questions
Q1. The International North-South Transport Corridor links India with Russia and Europe through
(a) China and Kazakhstan
(b) Pakistan and Afghanistan
(c) Iran, the Caspian Sea and Russia
(d) Myanmar and Thailand
Show answer
Answer: (c) — It was launched by India, Iran and Russia in 2000; Chabahar and Bandar Abbas are its Iranian ports.
Q2. Chabahar port is located on the coast of
(a) the Arabian Sea, in Pakistan
(b) the Persian Gulf, in Iraq
(c) the Gulf of Oman, in Iran
(d) the Red Sea, in Eritrea
Show answer
Answer: (c) — Gwadar, in Pakistan, is a Chinese-built port about 170 km to the east.
Q3. The India-Middle East-Europe Economic Corridor (IMEC) was announced at
(a) the BRICS summit in Kazan in 2024
(b) the SCO summit in Tianjin in 2025
(c) the G20 Summit in New Delhi in September 2023
(d) the UN General Assembly in 2022
Show answer
Answer: (c) — Its partners are India, the US, Saudi Arabia, the UAE, the EU, France, Germany and Italy.
Q4. The China-Pakistan Economic Corridor runs from
(a) Urumqi to Colombo
(b) Beijing to Dhaka
(c) Kashgar in Xinjiang to Gwadar in Balochistan
(d) Lhasa to Karachi
Show answer
Answer: (c) — India objects because a part passes through Pakistan-occupied Kashmir.
Q5. Which of the following straits links the Red Sea with the Gulf of Aden?
(a) Hormuz
(b) Malacca
(c) Bab-el-Mandeb
(d) Bosporus
Show answer
Answer: (c) — It lies between Yemen and Djibouti and Eritrea.
Q6. Consider the following statements about the Suez Canal and the Sumed pipeline:
1. The Suez Canal joins the Mediterranean and the Red Sea.
2. The Sumed pipeline runs from the Gulf of Suez to the Mediterranean.
Which of the statements given above is/are correct?
(a) Neither 1 nor 2
(b) 1 only
(c) Both 1 and 2
(d) 2 only
Show answer
Answer: (c) — The Sumed pipeline gives Gulf oil a by-pass to the Mediterranean.
Q7. The India-Myanmar-Thailand Trilateral Highway connects
(a) Moreh in Manipur with Mae Sot in Thailand
(b) Agartala with Dhaka
(c) Guwahati with Bangkok by sea
(d) Kolkata with Yangon by rail
Show answer
Answer: (a) — Kaladan is the separate multimodal route from Kolkata to Mizoram.
Q8. Consider the following statements about the Agartala-Akhaura rail link:
1. It connects India and Bangladesh.
2. It was built with Indian grant assistance.
3. Bangladesh is an ASEAN member.
Which of the statements given above are correct?
(a) 2 and 3 only
(b) 1 and 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
Show answer
Answer: (b) — ASEAN has 11 members after Timor-Leste joined; Bangladesh is not one of them.
Q9. Hambantota port in Sri Lanka was leased to a Chinese company for how many years in 2017?
(a) 10
(b) 99
(c) 50
(d) 30
Show answer
Answer: (b) — It is a standard example of the 'debt-trap' debate.
Q10. In the Strait of Hormuz crisis of 2026, the Indian Navy's escort mission for energy ships is called
(a) Operation Ganga
(b) Operation Urja Suraksha
(c) Operation Sindhu
(d) Operation Brahma
Show answer
Answer: (b) — Secondary-source dates: it began in about March 2026.
Q11. India Ports Global Limited operates a terminal at
(a) Hambantota
(b) Chabahar's Shahid Beheshti port
(c) Gwadar
(d) Djibouti
Show answer
Answer: (b) — The 10-year contract was signed in May 2024.
Q12. Which of the following is NOT a chokepoint on the sea route between the Persian Gulf and East Asia?
(a) Lombok Strait
(b) Strait of Malacca
(c) Strait of Hormuz
(d) Bab-el-Mandeb
Show answer
Answer: (d) — Bab-el-Mandeb lies on the Red Sea route towards Europe, not on the route to East Asia.
UPSC Previous Year Questions (PYQs)
Real UPSC Prelims questions, checked against the official paper and answer key.
Q1. (2025) India is one of the founding members of the International North-South Transport Corridor (INSTC), multimodal transportation corridor, which will connect
(a) India to Europe through Azerbaijan
(b) India to Central Asia to Europe via Iran
(c) India to Central Asia via China
(d) India to South-East Asia through Bangladesh and Myanmar
Show answer
Answer: (b) — The International North-South Transport Corridor links India, Iran, Azerbaijan, Russia and Central Asia to Europe by sea, rail and road; Chabahar is a gateway to it.
Q2. (2024) Consider the following statements:
Statement-I: Sumed pipeline is a strategic route for Persian Gulf oil and natural gas shipments to Europe.
Statement-II: Sumed pipeline connects the Red Sea with the Mediterranean Sea.
Which one of the following is correct in respect of the above statements?
(a) Statement-I is correct, but Statement-II is incorrect
(b) Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
(c) Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
(d) Statement-I is incorrect, but Statement-II is correct
Show answer
Answer: (c) — The Sumed pipeline runs from Ain Sukhna on the Gulf of Suez (Red Sea) to Sidi Kerir near Alexandria on the Mediterranean, letting Gulf oil bypass the Suez Canal. Statement-II explains why Statement-I is true.
Q3. (2024) Consider the following statements:
1. The Red Sea receives very little precipitation in any form.
2. No water enters the Red Sea from rivers.
Which of the statements given above is/are correct?
(a) Both 1 and 2
(b) 2 only
(c) 1 only
(d) Neither 1 nor 2
Show answer
Answer: (a) — The Red Sea lies in an arid zone: rainfall is very low and no river flows into it, which together with high evaporation makes it unusually salty.
Q4. (2026, provisional key) Ships from which of the following countries have to cross the Strait of Hormuz to reach out to the Indian Ocean?
1. Bahrain
2. Syria
3. Qatar
4. Egypt
Select the answer using the code given below:
(a) 2 and 3
(b) 1 and 3
(c) 1 and 2
(d) 3 and 4
Show answer
Answer: (b) — Bahrain and Qatar lie inside the Persian Gulf, so their ships must pass the Strait of Hormuz to reach the Indian Ocean. Syria and Egypt have Mediterranean and Red Sea coasts and do not (provisional key).
Q5. (2016) 'Belt and Road Initiative' is sometimes mentioned in the news in the context of the affairs of
(a) China
(b) European Union
(c) African Union
(d) Brazil
Show answer
Answer: (a) — The Belt and Road Initiative is China's global connectivity and infrastructure programme (announced 2013).
Q6. (2023) With reference to India's projects on connectivity, consider the following statements:
1. East-West Corridor under Golden Quadrilateral Project connects Dibrugarh and Surat.
2. Trilateral Highway connects Moreh in Manipur and Chiang Mai in Thailand via Myanmar.
3. Bangladesh-China-India-Myanmar Economic Corridor connects Varanasi in Uttar Pradesh with Kunming in China.
How many of the above statements are correct?
(a) All three
(b) None
(c) Only one
(d) Only two
Show answer
Answer: (b) — The East-West Corridor connects Silchar and Porbandar; the India-Myanmar-Thailand Trilateral Highway links Moreh to Mae Sot; the BCIM corridor links Kolkata with Kunming. All three statements are wrong.
Q7. (2026, provisional key) Which of the following connectivity projects is/are a part of cooperation between India and the ASEAN member countries?
1. Kaladan Multi-Modal Transit Transport Project
2. IMT Trilateral Highway
3. Agartala-Akhaura Rail Line
Select the answer using the code given below:
(a) 1 and 3
(b) 2 and 3
(c) 1 and 2
(d) 2 only
Show answer
Answer: (c) — Kaladan (Myanmar) and the IMT Trilateral Highway (Myanmar, Thailand) run through ASEAN members. The Agartala-Akhaura rail link is with Bangladesh, which is not an ASEAN member (provisional key).
Mains Practice Questions
Use these to frame full-length answers. You don't have to answer one exactly — they show the angles UPSC tests, so let them guide which points you cover.
A number of outside powers have entrenched themselves in Central Asia, which is a zone of interest to India. Discuss the implications of India's joining the Ashgabat Agreement, 2018.
Evaluate the INSTC and Chabahar as India's answers to the Belt and Road Initiative, and the effect of US sanctions on them.
How has the 2026 Hormuz crisis exposed the vulnerability of India's energy security, and what alternative routes can India build?
Is IMEC realistic? Examine its political and economic obstacles after the Gaza war.
UPSC Mains — Previous Years’ Questions on this topic (last 10 years)
These are the actual GS Mains questions UPSC has asked on this theme — real proof of how, and when, it is tested. Try to write a full answer to each.
2018 (GS-II): A number of outside powers have entrenched themselves in Central Asia, which is a zone of interest to India. Discuss the implications, in this context, of India's joining the Ashgabat Agreement, 2018.