Marmaray rail tunnel

E130705

rail infrastructure project transportation structure undersea railway tunnel

The Marmaray rail tunnel is an undersea railway tunnel in Istanbul that connects the European and Asian sides of the city beneath the Bosporus Strait.

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All labels observed (8)

Label	Occurrences
Marmaray line	6
Marmaray	3
Marmaray rail line	3
Marmaray commuter rail	2
Marmaray Tüneli	1
Marmaray commuter rail line	1
Marmaray project	1
Marmaray rail tunnel canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T1136361 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Marmaray rail tunnel
Context triple: [Bosporus, crossedBy, Marmaray rail tunnel]

A. Al Shindagha Tunnel
Al Shindagha Tunnel is a major underwater road tunnel in Dubai that carries vehicular traffic beneath Dubai Creek, connecting the historic districts of the city.
B. Tunca Bridge
Tunca Bridge is a historic Ottoman-era stone bridge spanning the Tunca River in Edirne, Turkey.
C. Yavuz Sultan Selim Bridge
Yavuz Sultan Selim Bridge is a modern suspension bridge spanning the Bosphorus Strait in Istanbul, serving both road and rail traffic and symbolizing the city's connection between Europe and Asia.
D. Meriç Bridge
Meriç Bridge is a historic Ottoman-era stone bridge spanning the Maritsa (Meriç) River in Edirne, Turkey, known for its elegant arches and scenic views.
E. Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Marmaray rail tunnel
Target entity description: The Marmaray rail tunnel is an undersea railway tunnel in Istanbul that connects the European and Asian sides of the city beneath the Bosporus Strait.

A. Al Shindagha Tunnel
Al Shindagha Tunnel is a major underwater road tunnel in Dubai that carries vehicular traffic beneath Dubai Creek, connecting the historic districts of the city.
B. Tunca Bridge
Tunca Bridge is a historic Ottoman-era stone bridge spanning the Tunca River in Edirne, Turkey.
C. Yavuz Sultan Selim Bridge
Yavuz Sultan Selim Bridge is a modern suspension bridge spanning the Bosphorus Strait in Istanbul, serving both road and rail traffic and symbolizing the city's connection between Europe and Asia.
D. Meriç Bridge
Meriç Bridge is a historic Ottoman-era stone bridge spanning the Maritsa (Meriç) River in Edirne, Turkey, known for its elegant arches and scenic views.
E. Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	rail infrastructure project ⓘ transportation structure ⓘ undersea railway tunnel ⓘ
cityServed	Istanbul ⓘ
connects	Asian side of Istanbul ⓘ European side of Istanbul ⓘ
connectsContinent	Asia ⓘ Europe ⓘ
connectsStation	Ayrılık Çeşmesi station ⓘ linked to: Haydarpaşa Railway Station Kazlıçeşme station ⓘ Sirkeci station ⓘ linked to: Kazlıçeşme station Yenikapı station ⓘ linked to: Kazlıçeşme station Üsküdar station ⓘ linked to: Kazlıçeşme station
constructionMethod	immersed tube tunnel ⓘ
constructionStartDate	2004 ⓘ
country	Turkey ⓘ
crosses	Bosporus Strait ⓘ linked to: Bosporus
designedFor	commuter rail traffic ⓘ freight rail traffic ⓘ intercity rail traffic ⓘ
electrification	25 kV AC overhead line ⓘ
fundedBy	European Investment Bank ⓘ Government of Japan ⓘ Republic of Turkey ⓘ linked to: Turkey
gauge	1435 mm ⓘ
hasNameInTurkish	Marmaray Tüneli ⓘ linked to: Marmaray rail tunnel
languageOfName	Turkish ⓘ
lengthApproximate	13.6 km (entire Marmaray rail link) ⓘ
locatedIn	Istanbul ⓘ Turkey ⓘ
maximumDepthApproximate	60 m below sea level ⓘ
namedAfter	Marmara Sea ⓘ linked to: Sea of Marmara
numberOfTracks	2 ⓘ
opened	2013-10-29 ⓘ
operator	TCDD Taşımacılık ⓘ linked to: Turkish State Railways
owner	Republic of Turkey ⓘ linked to: Turkey
partOf	Istanbul commuter rail network ⓘ Marmaray project ⓘ linked to: Marmaray rail tunnel
passesUnder	Bosporus seabed ⓘ
purpose	provide high-capacity cross-Bosporus rail link ⓘ reduce traffic congestion in Istanbul ⓘ
railwayLine	Halkalı–Gebze commuter rail line ⓘ
region	Marmara Region ⓘ
safetyFeature	earthquake-resistant design ⓘ
significance	first rail tunnel directly linking European and Asian sides of Istanbul ⓘ
trafficType	freight ⓘ passenger ⓘ
underseaSectionLengthApproximate	1.4 km ⓘ

How these facts were elicited