| worldwide | turkey PC Control 04 | 2016 Marmaray rail tunnel connects Europe and Asia The Marmaray tunnel in Istanbul, connecting the European and Asian parts of the city, is used by 1 million people every day. The journey through the 1.4 km tunnel section, at a depth of 56 meters below sea level, takes just four minutes. The ambitious tunnel project took nine years to build and was opened in October 2013. It is one of the largest infrastructure projects in the world. The total length of the rail system is 76 km, 13.6 km of which runs through tunnels. Since 2015, alongside the Marmaray tunnel, the Gebze-Pendik section of the line is open for long-distance trains coming from Ankara to Istanbul. The full rail system is scheduled for completion in 2018. Of course, precise monito

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