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Trans-Mongolian Railway

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The Trans-Mongolian Railway is a vital international rail link.

Trans Mongolian Railway
Trans Mongolian Railway

It connects Ulan-Ude in Russia to Ulanchab in China. To do this, the tracks run through the heart of Mongolia. The line passes through the Mongolian capital, Ulaanbaatar. This railway is much more than just a set of tracks. It serves as a massive bridge for trade and travel across Asia. It links the Trans-Siberian Railway to the rail networks of Inner Mongolia.

One of the most complex parts of this railway is the track gauge. The gauge is the distance between the two metal rails. In Russia and Mongolia, the tracks use a 1,520 mm Russian gauge. However, China uses a 1,435 mm standard gauge.

Bogie Swap at the Mongolia-China Border, Erlian (149199529)
Bogie Swap at the Mongolia-China Border, Erlian (149199529)

Because the widths are different, trains cannot simply roll from one country to the next. At the Erenhot station on the Chinese border, the railway changes from single-track to double-track. Here, workers use specialized equipment for a bogie exchange. A bogie is the heavy wheel frame located underneath a train car. By swapping these frames, the same train cars can transition to the different track widths.

Major stations and branch lines define the railway's structure. The main line includes stations at Naushki, Darkhan, Züünkharaa, Choir, Sainshand, and Zamyn-Üüd.

Darkhan-1 Railway Station
Darkhan-1 Railway Station

Beyond the main route, several important branch lines connect to industrial sites. There is a 164 km line to the Erdenet copper mine.

Erdenet 09
Erdenet 09

Another branch runs 85 km to the Baganuur coal mine. Other branches reach the Sharyngol coal mines, the Bor-Öndör fluorspar mine, and the Züünbayan oil refinery. These branches allow the railway to act as a lifeline for Mongolia's mining industry.

History shows that building this network was a long process.

Naushki railway station, Buryatia, Russia
Naushki railway station, Buryatia, Russia

Development began in 1937 with a line from Ulan-Ude to Naushki. Construction toward Ulaanbaatar was delayed by World War II. That section was finally finished in November 1949. The full Trans-Mongolian line was completed in 1956. The Inner Mongolian leader Ulanhu officially opened it on 1 January 1956. The Soviet 505th Penal Unit helped build the line in Mongolia. In 1958, the system moved from older technology to diesel engines and automated switching.

Modernization has continued to change how the railway operates. In the 1990s, powerful American locomotives replaced some old Soviet models.

Locomotives d' Oulan bator (1)
Locomotives d' Oulan bator (1)

Engineers also installed fiber-optic cables for better signaling and communication. Today, the 1,110 km Mongolian section is managed by the Ulaanbaatar Railway Company, or UBTZ. This is a joint-stock company owned equally by Russia and Mongolia. As of 2000, UBTZ operated 60 locomotives and 2,400 freight wagons. This includes 300 passenger cars and 140 container wagons.

Ulaanbaatar Railway Station
Ulaanbaatar Railway Station

The railway is essential to the Mongolian economy. In 1998, rail transport carried 96 percent of the country's freight. It also handled 55 percent of all passenger traffic. One famous service is the China Railway K3/4 train. This international service began in 1959. It provides a direct connection between the major cities of Beijing and Moscow. The railway makes such long-distance travel possible across vast distances.

Looking forward, there are many plans for new tracks. A 2010 plan proposed over 5,600 km of new lines. This included connecting Dalanzadgad and Choibalsan through several stages. Some of these lines would use the Russian gauge, while others would use the Chinese gauge. In 2023, a new line linking Züünbayan to Khangi was completed.

扎门乌德火车站
扎门乌德火车站

New construction is also happening to link the Tavan Tolgoi coal mines to the border. These developments show how the railway continues to grow and evolve.

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🖼️ Images & Media (16)
File:Karte Schienennetz Mongolei.svg
Karte Schienennetz Mongolei.svg
File:Sainshand Railway Station2013.jpg
Sainshand Railway Station2013.jpg
File:扎门乌德火车站.jpg
扎门乌德火车站.jpg
File:Erdenet 09.JPG
Erdenet 09.JPG
File:Locomotives d' Oulan bator (1).JPG
Locomotives d' Oulan bator (1).JPG
File:Naushki railway station, Buryatia, Russia.jpg
Naushki railway station, Buryatia, Russia.jpg
File:Ulaanbaatar Railway Station.jpg
Ulaanbaatar Railway Station.jpg
File:Bord du Transmongolien.jpg
Bord du Transmongolien.jpg
File:Darkhan-1 Railway Station.jpg
Darkhan-1 Railway Station.jpg
File:Bogie Swap at the Mongolia-China Border, Erlian (149199529).jpg
Bogie Swap at the Mongolia-China Border,...
File:Oulan bator aux abords de la gare (4).JPG
Oulan bator aux abords de la gare (4).JPG
File:Trans Mongolian Railway.jpg
Trans Mongolian Railway.jpg

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