Opinion: Why Central Asia Cannot Afford to Abandon the Iranian Route

Kazakhstan had barely secured a foothold in Iran’s largest commercial port when renewed military escalation made the southern route risky again. The problem for Central Asia is that Iran is more than a trading partner. For a region without direct access to the open sea, it provides one of the few overland routes to the Persian Gulf and the Indian Ocean. On June 28, Kazakhstan and Iran signed a 27-year build-operate-transfer (BOT) agreement for a Kazakh transport and logistics terminal at Shahid Rajaee Port in Bandar Abbas. The agreement allocates two years for construction and the following 25 for operation. Astana expects the terminal to provide more direct access to markets in the Gulf, South and Southeast Asia, and East Africa. The project almost immediately found itself in a different reality. In July, U.S. strikes hit Iranian railway and coastal infrastructure. The Aq Taqeh Khan bridge on a rail route connecting Iran with Turkmenistan and, further north, with Kazakhstan, was damaged. There was no confirmed halt to Central Asian freight traffic, but military risk was no longer an abstract concern for carriers. That risk has now been compounded by a new U.S. sanctions campaign. On August 24, U.S. Treasury Secretary Scott Bessent launched what Washington calls Operation Economic Outcast, combining direct sanctions with pressure on Iran’s foreign economic partners. The United States said it would set timelines for other countries to shut down economic activity with Iran, while the scope of secondary sanctions was expanded to cover five areas: digital assets, technology, gold, aviation, and shipping. Nearly 60 Iran-linked individuals, entities, and vessels were also sanctioned. The United States has not publicly identified which countries could face penalties first. War and sanctions can make the Iranian route more expensive, slower, and more dangerous. They cannot change geography. Iran gives Central Asia overland access to ports on the Persian Gulf and Gulf of Oman. From Bandar Abbas and Chabahar, cargo can move onward toward India, the Gulf states, and East Africa. Iran also provides a western overland route toward Turkey. This is one of the fundamental differences between the Iranian route and the Middle Corridor, which crosses the Caspian Sea before continuing through Azerbaijan, Georgia, and Turkey. The Middle Corridor requires cargo to move between rail and maritime transport. Iran offers the possibility of a continuous overland chain while also providing access to ports connected to the Indian Ocean. For Kazakhstan, the southern route is already more than a plan. Trade with Iran increased by 26.4% in 2025 to $430.2 million. Freight traffic along the International North-South Transport Corridor reached 3.5 million tons, while rail traffic between Kazakhstan and Iran increased by 69%. It is this expanding transport network that is now exposed to greater military and sanctions risks. There is another factor. A free trade agreement between Iran and the Eurasian Economic Union, which includes Kazakhstan and Kyrgyzstan, entered into force on May 15, 2025. It significantly reduced tariff barriers to trade in goods between the two sides. Uzbekistan offers...