East Siberian Railway At first, the East Siberian Railway was a single-track railroad. In 1907, they began the construction of the second track, which would end in 1916. Administratively, the main line was divided into four railways: the Siberian Railway (from Chelyabinsk to Innokentyevskaya railway station with a line towards Tomsk), the Transbaikal Railway (from Innokentyevskaya railway station to Sretensk with a line towards Manchuria railway station), the Ussuri Railway (from Vladivostok to Khabarovsk), and the Amur Railway (from Kuyenga railway station to Khabarovsk). In 1915, the East Siberian Railway was divided into five railways, the Omsk Railway, Tomsk Railway, Transbaikal Railway, Amur
Trans-Mongolian Railway line began in 1947, reaching Ulan Bator from the north in 1950 and the Chinese border in 1955. Before that the only railways in Mongolia had been a line (opened in 1938) connecting the coal mines at Nalaikh to the capital and a Soviet-built freight-only branch (completed in 1939) from Borzya on the Trans-Siberian Railway to Bayantümen, Dornod near Choibalsan in north-eastern Mongolia. Russian Irkutsk State University of Railway Engineering opened its Ulaanbaatar branch in June 2009. The Mongolian Railway company "Mongolyn Tömör Zam" carries 80% of all freight and 30% of all passenger transport within Mongolia. In the aftermath