Can Iran Replace Sea Trade With Land Routes?

Shifting the Trade Landscape

For decades Iran relied on the Persian Gulf and the Strait of Hormuz to move oil, petrochemicals and consumer goods. Since the early 2020s, a series of US sanctions has made the southern maritime corridor increasingly risky for Iranian vessels. In response, Tehran has accelerated investment in northern ports on the Caspian Sea and in a network of overland routes that link the country to Central Asia, Turkey and the Caucasus.

Why the southern ports are under pressure

The U.S. Treasury Office of Foreign Assets Control has expanded its sanctions list to include many Iranian shipping companies and related service providers. Vessels that attempt to dock at Bandar Abbas or other Gulf ports face the threat of being denied insurance, fuel or port services. Insurance firms based in Europe and Asia have also tightened their policies, leaving Iranian carriers with few options for safe passage.

Emerging northern gateways

Ports such as Anzali and Astara on the Caspian Sea are now receiving greater attention. These facilities offer a direct link to the railway networks of Kazakhstan, Turkmenistan and Russia. The Iranian government has pledged to modernise cargo handling equipment, expand storage capacity and streamline customs procedures at these sites. According to a Reuters report on Iran's northward trade shift, cargo volumes at Caspian ports grew by more than 30 percent in the past year.

Key overland corridors

Three main land routes are being developed to complement the northern ports:

• Northwest corridor – connects Tehran to the Turkish border via the Karaj‑Ankara highway and then to European markets.
• Central Asian corridor – runs from the Caspian ports through the Turkmenistan border, linking to the Trans‑Caspian railway that reaches Kazakhstan and beyond.
• Southern east corridor – uses the road network through Iran's eastern provinces to reach the Afghan border and the broader South Asian market.

These routes rely heavily on existing rail and road infrastructure, but the Iranian government is investing in new bridges, border facilities and customs automation to reduce transit times.

Economic benefits of land based trade

Overland transport can lower the cost of moving bulk commodities such as wheat, cement and construction steel. A study by the World Bank logistics data shows that rail freight across the Caspian corridor can be up to 20 percent cheaper than sea freight when sanctions increase insurance premiums. Land routes also provide a degree of resilience; if a Gulf port is temporarily closed, trucks and trains can continue to move goods without waiting for maritime clearance.

Limits of the land strategy

Despite these advantages, analysts caution that land corridors cannot fully replace maritime trade. Shipping remains the most efficient method for moving large volumes of oil and refined products. The capacity of Iran's rail network is limited, and bottlenecks at border crossings can cause delays. Moreover, the UNCTAD maritime transport review notes that global oil demand still relies on tanker routes that pass through the Strait of Hormuz.

Another challenge is the quality of infrastructure in neighboring countries. While Kazakhstan and Russia have well‑developed rail systems, Afghanistan and parts of Central Asia still face security and maintenance issues that can disrupt supply chains.

Geopolitical implications

Iran's pivot to northern and overland routes aligns it more closely with Russia, Kazakhstan and Turkey. This shift may deepen economic ties with these states, but it also raises concerns among Western policymakers who view the new corridors as a way for Iran to circumvent sanctions. The United States has warned that it will monitor any attempts to use alternative pathways for prohibited goods.

At the same time, the European Union is exploring ways to support stable trade through the Caspian region. Initiatives to improve customs harmonisation and to invest in joint logistics hubs could benefit both Iranian exporters and European importers seeking reliable sources of commodities.

Future outlook

In the short term, land routes will likely handle a growing share of non‑oil goods, especially food, pharmaceuticals and construction materials. Over the next five years, Iran aims to increase the share of cargo moving through Caspian ports from the current 10 percent to around 25 percent, according to the Iran Ministry of Roads and Urban Development. Achieving this goal will require continued investment in rail electrification, border processing technology and regional cooperation agreements.

Long term, the maritime sector remains essential for Iran's energy exports. Unless sanctions are lifted or a diplomatic breakthrough occurs, the country will continue to balance sea and land strategies, using each mode where it offers the greatest advantage.