Mongolia, September 2026 — The Tavan Tolgoi–Gashuunsukhait railway has strengthened Mongolia’s position as a coal supplier to China by providing a lower-cost alternative to road transport. The 233.6km heavy-haul corridor has helped support a sharp increase in coal exports while reducing the logistics cost associated with moving bulk commodities to the Chinese border.
The railway is designed to handle between 30 million and 50 million tonnes of freight annually. It uses 1,520mm gauge track, 25-tonne axleloads and trains of around 100 wagons hauled by two EMD locomotives, with each train capable of carrying approximately 10,000 tonnes. A loading facility commissioned in 2024 can process up to 3,500 tonnes per hour.
Rail’s cost advantage has become particularly important as coal prices have declined. Reported estimates put rail transport at roughly one-quarter of the road cost, although the figures vary depending on whether border transshipment is included. With coal margins under pressure, maintaining high utilisation and reliable train cycles will be increasingly important for both mining companies and railway operators.
A significant operational constraint remains the break of gauge at the Chinese border, where coal has historically required additional handling between the Mongolian broad-gauge network and China’s standard-gauge system. The planned Gashuunsukhait–Gantsmod cross-border connection and expansion at Ganqimaodu are expected to increase border capacity and reduce the inefficiencies associated with transshipment.
The corridor’s next phase will therefore depend on more than available coal volumes. Sustaining 30 million tonnes annually appears achievable, while reaching the upper 50-million-tonne target will require reliable loading operations, locomotive and crew availability, winter resilience and improved cross-border interchange. The development highlights how heavy-haul rail performance increasingly depends on the entire logistics chain rather than the railway alone.
Source: International Railway Journal
Mongolia’s Heavy-Haul Coal Railway Faces Throughput And Border Challenges
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Heavy-haul rail is reshaping Mongolia’s coal export logistics by significantly reducing transport costs compared with road haulage. However, falling coal prices, winter operating conditions and cross-border handling constraints are now testing whether the Tavan Tolgoi–Gashuunsukhait corridor can sustain the throughput required to reach its full capacity.
