MARMARAY r Project of the Century MAR

Map of TCDD Marmaray
Map of TCDD Marmaray

The Marmaray Project, one of the most important projects in the world, is a project that does not pollute the environment by using high capacity electrical energy in order to maintain Istanbul's urban life in a healthy way, to offer a modern urban life and urban transportation opportunities to the citizens.


Istanbul is a city that needs to be protected with historical and cultural values, on the other hand, to reduce the environmental impact of public transportation systems and to establish modern railway facilities to increase the capacity, reliability and comfort of railway systems.

The project is located on the European side Halkalı is based on the construction of the railway subway system and the upgrading of the suburban rail system in Istanbul in order to connect the Gebze districts on the Asian side with a continuous, modern and high capacity suburban rail system.

Railway lines on both sides of the Bosphorus will be connected by a railway tunnel connecting the Bosphorus. The line will go underground in Kazlıçeşme; it will move along the new underground stations Yenikapı and Sirkeci, pass under the Bosphorus and connect to Üsküdar, another new underground station, and re-surfaced at Söğütlüçeşme.

World's Largest Infrastructure Project

The project is currently one of the largest transport infrastructure projects in the world. The entire new and improved railway system will be approximately 76 km long. Main structures and systems, immersed tube tunnel, drilling tunnels, open-close tunnels, level structures, 3 new underground station, 36 aboveground station (renovation and improvement), operating control center, pitches, workshops, maintenance facilities, to be built on the ground new A third line will consist of 4 parts, including the upgrade of existing lines, completely new electrical and mechanical systems and modern rail vehicles to be supplied. A separate contract is made for each section;

  1. Engineering and Consulting Services (in force)
  2. BC1 Railway Bosphorus Tube Crossing Construction
  3. CR3 Gebze-Halkalı Improvement of Commuter Lines, Construction, Electrical and Mechanical Systems (In the Tender Process)
  4. Supply of CR2 Railway Vehicles (in force)

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