Author: George Katcharava
The prospect of prolonged conflict in Iran is precipitating a tectonic realignment of Eurasian logistics, forcing landlocked Central Asian states and the South Caucasus into a high-stakes recalibration of their transit architecture. For thirty years, Tehran served as the indispensable "southern vent," providing a critical outlet that circumvented the geopolitical congestion of the Russian north and the maritime limitations of the Caspian. However, the threat of regional war now risks transforming this strategic corridor into a logistical cul-de-sac, threatening the viability of the International North-South Transport Corridor (INSTC). This route, which handled at its peak roughly 26.9 million tonnes of freight in 2023, faces immediate paralysis if primary hubs like Bandar Abbas port, handling approximately 90 per cent of Iran's container throughput, are rendered inaccessible and dysfunctional.
For Central Asia’s landlocked economies, the stakes are existential. Tajikistan and Turkmenistan, with nearly $500 million and $600 million in annual trade respectively, which rely on imports from Iran concerning non-oil commodities as well as its terrestrial links to reach global markets, face a sudden inflationary shock as transit costs are projected to climb by as much as 25 -30 per cent in a likely total-closure scenario.
For Uzbekistan, the outbreak of hostilities in Iran has fundamentally imperiled its "southern vector," transforming a strategic gateway into a geopolitical bottleneck. With the Strait of Hormuz effectively closed, Tashkent and other Central Asian capitals, face a logistical paralysis that threatens to erase recent gains in trade diversification. Bilateral turnover with Iran, which exceeded $570 million in 2025, is now at risk as maritime access via Bandar Abbas and Chabahar ports stalls. This disruption, as in the case of Tajikistan and Turkmenistan, forces a pivot toward the Middle Corridor, potentially inflating transit costs.
This severance of the southern route is likely to accelerate another pivot toward Beijing’s orbit; already, China-bound cargo volumes from Kazakhstan rose 13 per cent last year, signaling a consolidation of dependence on eastern-oriented infrastructure. The disruption would effectively strand billions in recent capital expenditure, including the $2 billion expansion of the western rail link connecting Russia to the Persian Gulf via Azerbaijan, that included not only construction of Rasht-Astara rail link, but also upgrading costs for entire Iranian segment of the railroad, as well as investment in new locomotive park serving this route.
In the South Caucasus, the proximity to a northern Iranian theater creates an immediate financial and physical difficulties. Azerbaijan, which has spent a decade positioning itself as a multimodal bridge, now faces the prospect of soaring insurance premiums for Caspian shipping. Industry analysts suggest that localized volatility could see hull and machinery premiums for regional vessels double, mirroring the "war risk" surcharges already seen in the Black Sea. Furthermore, the reported targeting of vessels in the Caspian, effectively making it a war zone, has introduced a new layer of risk that threatens to derail the revenue models of burgeoning port authorities from Aktau to Baku/Alyat.
Yet, this regional shock is acting as a catalyst for the long-delayed maturation of the Trans-Caspian International Transport Route, or Middle Corridor. With the Russian Northern Route constrained by sanctions and the Iranian route compromised by kinetic risk, the path via Georgia’s Black Sea ports has emerged as the only viable solution. The World Bank estimates that the Middle Corridor requires nearly $20 billion in targeted investments to address systemic bottlenecks, such as uncoordinated customs protocols and limited berth capacity. Current data suggests this transition is already underway, specifically notable improvement of railway infrastructure along Rikoti pass increased capacity to handle turnover to up to 47 million tonnes annually in this segment of Georgian railway network; container traffic along the route grew by 36 per cent in 2025, as shippers prioritize security over traditional cost-efficiency.
Ultimately, the erosion of Iran’s stability is stripping away the pretense of "multi-vector" transit security. Central Asian and South Caucasian capitals are being forced into a brutal prioritization of the Trans-Caspian route, potentially forging a unified, singular logistics bridge. While the immediate horizon is defined by supply chain dislocations and lost maritime access, the structural result may be a more resilient trade bloc. By 2030, the Middle Corridor is projected to increase its throughput to 11 million tonnes, marking a permanent shift toward a more integrated, self-sustaining Eurasian core.
Author’s bio: George Katcharava is a founder of eurasiaanalyst.com , geopolitical risk, consulting and advisory firm.
