Mongolian second railway line Bayantumen - Ereentsav. This 240km's long railway is located in far-east Mongolia and the line is directly connected to the far-eastern part of Russian Railways (Trans-Manchuria railway) and Borzya city. Train traffic is lower but very interesting, twice in a week freight-passenger mixed train and some short freight train runs with an old TEM2 shunter locomotive. The line had been in Soviet time used for mainly transporting uranium from Mardai mines and was considered as a Military strategical secret railway. Now, this railway line is open and normally working since collapsing of the Soviet Union and still uses semaphores and tokens in the signalization system.