Overseas Projects

Overseas Project (Bosporus Tunnel Project Consideration)

Istanbul is the largest city in the Republic of Turkey (with a population of 12 million in 2003, which is 17% of the country’s population,) surpassing Ankara, the capital of Turkey. The city has been the center of culture and economy, and continues to grow. The transportation within Turkey is over 90% by land, and there are 2 major international highways running through the country. The biggest obstacle is the Bosporus strait. The Bosporus is the entrance to the Black Sea, and as a ship route connecting the east and the west, the Bosporus has traffic of 10,000 ships per year.
At present, there are two bridges crossing over the Bosporus. The traffic of these bridges is 387,000 per day (these bridges were designed to handle 270,000 per day,) and there are heavy congestions that occur every day. To resolve this problem, the government of Turkey has decided to construct a mass transit rail system that runs below the Bosporus.
However, with the growth of population (estimated to grow to 13 million in 2010) and the rise in the number of car ownership, there is a need for a new way to cross the Bosporus. There is a plan to construct a tunnel under the Bosporus with the BOT method. This inspection was done to determine if the project is possible with the BOT method, considering the conditions.

※BOT is short for Build-Operate-Transfer. It is a form of project financing. Private corporations provide the funds, and after the completion of the project, the users are charged a fee to recover the money and to make a profit. The project is then handed over to the country. It is a high risk operation, because an enormous amount of money is needed, and the project usually takes time, during which the political, social, and economical status may change drastically. It is not frequently done in Japan, but is popular in some countries.

Bosporus Tunnel Project Consideration

Bosporus Tunnel Project Consideration

Consideration Content

  1. Plan consideration and on-site investigation
  2. Overall road consideration and tunnel equipment research
  3. The road management and maintenance system and cost consideration

On-site Inspection

  1. Planned Bosporus Tunnel route (land use, facilities and equipment, intersection, control point)
  2. Traffic and road condition, local culture and livelihood of Istanbul
  3. Land use and city trend of Istanbul
  4. Marmaray Project construction status
  5. Local area meetings

Bosporus Tunnel Project Consideration

Bosporus Tunnel Project Consideration

Bosporus Tunnel Project Consideration

Bosporus Tunnel Project Consideration

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