The Great Istanbul Tunnel ( tr, Büyük İstanbul Tüneli) is a proposed multi-use

highway A highway is any public or private road or other public way on land. It is used for major roads, but also includes other public roads and public tracks. In some areas of the United States, it is used as an equivalent term to controlled-access ...

and

railway Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a pre ...

undersea tunnel An underwater tunnel is a tunnel which is partly or wholly constructed under the sea or a river. They are often used where building a bridge or operating a ferry link is unviable, or to provide competition or relief for existing bridges or ferry li ...

Istanbul Istanbul ( , ; tr, İstanbul ), formerly known as Constantinople ( grc-gre, Κωνσταντινούπολις; la, Constantinopolis), is the List of largest cities and towns in Turkey, largest city in Turkey, serving as the country's economic, ...

, Turkey to cross the

Bosphorus The Bosporus Strait (; grc, Βόσπορος ; tr, İstanbul Boğazı 'Istanbul strait', colloquially ''Boğaz'') or Bosphorus Strait is a natural strait and an internationally significant waterway located in Istanbul in northwestern Tu ...

strait.

Project

The project was officially announced by Prime minister

Ahmet Davutoğlu Ahmet Davutoğlu (; born 26 February 1959) is a Turkish academic, politician and former diplomat who served as the 26th Prime Minister of Turkey and Leader of the Justice and Development Party (AKP) from 2014 to 2016. He previously served as M ...

on 27 February 2015. The tunnel, in length and in diameter, will consist of three levels, two levels for road traffic and one level for a rail system. It will be under the sea level. Situated between Gayrettepe on the European side and Küçüksu on the

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

n side, it will integrate the highways between the three airports of the city,

Istanbul Atatürk Airport ) , postal_code_type = Postal code , postal_code = 34000 to 34990 , area_code = +90 212 (European side) +90 216 (Asian side) , registration_plate = 34 , blank_name_sec2 = GeoTLD , blank_i ...

Sabiha Gökçen Airport Sabiha is an Arabic word () meaning "Morning" and a female given name. In Urdu it (خوبصورت، گوری چٹی) refers to beautiful, and blonde hair. People with the name include: People Given name *Sabiha Sultan (1894–1971), Ottoman princes ...

Istanbul Airport Istanbul Airport ( tr, İstanbul Havalimanı, ) is the main international airport serving Istanbul, Turkey. It is located in the Arnavutköy (district), Arnavutköy district on the European side of the city. All scheduled Commercial aviation, ...

, and the nine rail lines of the

Istanbul Metro The Istanbul Metro ( tr, İstanbul metrosu) is a rapid transit railway network that serves the city of Istanbul, Turkey. It is operated by Metro Istanbul, a company (formerly known as ''İstanbul Ulaşım A.Ş.'' before 2016), a public enterpris ...

. The cost of the project will amount to US$3.5 billion. The financing of the construction will be on the

build–operate–transfer Build–operate–transfer (BOT) or build–own–operate–transfer (BOOT) is a form of project delivery method, usually for large-scale infrastructure projects, wherein a private entity receives a concession from the public sector (or the priva ...

basis.

Construction

The RV ''Fugro Scout'', a Singapore-flagged research/survey vessel of length and beam, started

soil survey Soil, also commonly referred to as earth or dirt, is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Some scientific definitions distinguish ''dirt'' from ''soil'' by restricting the former term ...

works in Bosphorus on 28 July 2017 in order to determine the exact tunnel route.

References

Tunnels in Istanbul Toll tunnels in Turkey Railway tunnels in Turkey Bosphorus crossings Transport infrastructure under construction in Turkey Undersea tunnels in Europe Undersea tunnels in Asia {{Tunnel-stub

Project

Construction

See also

References