The US Treasury action explicitly targets the railway sector as Iran shifts cargo from sea to land. Since the start of the US-Iran conflict, a de facto maritime blockade has sharply restricted southern trade through the Strait of Hormuz, forcing Tehran to accelerate reliance on its rail connections with China, Central Asia, Russia and Turkey.
Shahriar Naghizadeh, director general for foreign trade at Iran's railway authority, told the semi-official Mehr news agency that the country operates around 15,000 kilometres of track, 35,000 wagons and nearly 500 diesel locomotives. The network carried 44 million tons of freight in the Iranian year ending in March 2026, up from 40 million tons the year prior, with a target of 54 million tons this year.
Iran is linked to its neighbours through 13 rail crossings, providing overland access to Turkey, Azerbaijan, Afghanistan, Pakistan and onward routes into Central Asia and China. Bloomberg reported in May that freight trains from the Chinese city of Xi'an to Tehran had increased from roughly one per week before the blockade to one every three or four days. A train carrying automotive parts and consumer goods departed China in September, travelling through Kazakhstan, Uzbekistan and Turkmenistan with an expected transit time of 14 to 16 days.
The reality on the ground is more complicated. A Chinese freight company told DW that actual delivery times can stretch to 50 to 60 days due to border inspections, customs procedures and train availability. Road transport along a similar route takes 22 to 25 days. The gap between a scheduled 14-day transit and commercial estimates of up to 60 days highlights the fundamental challenges facing Iran's land bridge strategy.
Alireza Salavati, managing director of London-based Middle East Analytica, said that rail is increasingly useful but cannot be mistaken for a replacement for maritime trade. Under normal conditions, ships move far larger quantities at lower unit costs. Rail becomes attractive for time-sensitive goods like automotive components, electronics and industrial inputs, where a halt in supply can stop a production line.
Salavati also warned of the cash-flow trap. For a manufacturer importing $1 million worth of inputs every 30 days, a journey of 30 days ties up roughly a million dollars in transit. If delivery times stretch further, companies need more working capital just to maintain the same production flow. "Reliability matters as much as speed," he said. "A 15-day train is little use if the container waits a week to depart, or if the bank or insurer will not touch it."
The new sanctions add another layer of uncertainty to that calculation. Salavati noted that Washington's efforts may be pushing Iran deeper into China's economic orbit and closer to Russia's wartime strategic system, though neither China nor Russia can fully compensate for the economic cost of US pressure. Container trains can only carry a fraction of a large cargo vessel, so rail remains a limited alternative trade channel.