Gotthard Base Tunnel
E452986
The Gotthard Base Tunnel is a 57-kilometer railway tunnel beneath the Swiss Alps, renowned as one of the world’s longest and deepest traffic tunnels, designed to improve high-speed rail connectivity across Europe.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Gotthard Base Tunnel canonical | 17 |
| Gotthard Rail Tunnel | 8 |
| Gotthard rail tunnel | 2 |
| Gotthard Base Tunnel north portal | 1 |
| Gotthard Base Tunnel region | 1 |
| Gotthard Base Tunnel route | 1 |
| Gotthard railway tunnels | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4562765 — 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: Gotthard Base Tunnel Context triple: [Chemins de fer fédéraux suisses, managesStructure, Gotthard Base Tunnel]
-
A.
Simplon Tunnel
The Simplon Tunnel is a major railway tunnel beneath the Alps connecting Switzerland and Italy, historically significant as one of the longest and most important transalpine rail routes.
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B.
Lötschberg Tunnel
The Lötschberg Tunnel is a major Swiss railway tunnel through the Bernese Alps that provides a key north–south transit route between the cantons of Bern and Valais.
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C.
Furka Base Tunnel
The Furka Base Tunnel is a long railway tunnel in the Swiss Alps that provides an all-weather, low-level route beneath the Furka Pass, improving connectivity and reliability on the Matterhorn Gotthard Bahn line.
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D.
Fréjus Rail Tunnel
The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
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E.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
- 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: Gotthard Base Tunnel Target entity description: The Gotthard Base Tunnel is a 57-kilometer railway tunnel beneath the Swiss Alps, renowned as one of the world’s longest and deepest traffic tunnels, designed to improve high-speed rail connectivity across Europe.
-
A.
Simplon Tunnel
The Simplon Tunnel is a major railway tunnel beneath the Alps connecting Switzerland and Italy, historically significant as one of the longest and most important transalpine rail routes.
-
B.
Lötschberg Tunnel
The Lötschberg Tunnel is a major Swiss railway tunnel through the Bernese Alps that provides a key north–south transit route between the cantons of Bern and Valais.
-
C.
Furka Base Tunnel
The Furka Base Tunnel is a long railway tunnel in the Swiss Alps that provides an all-weather, low-level route beneath the Furka Pass, improving connectivity and reliability on the Matterhorn Gotthard Bahn line.
-
D.
Fréjus Rail Tunnel
The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
-
E.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
base tunnel
ⓘ
infrastructure project ⓘ railway tunnel ⓘ |
| belongsToCorridor |
Rhine–Alpine Corridor
ⓘ
linked to:
Rhine–Alpine freight corridor
|
| breakthroughDate | 15 October 2010 ⓘ |
| builder | AlpTransit Gotthard AG ⓘ |
| connects |
Bodio
ⓘ
Erstfeld ⓘ |
| constructionCost | approximately 12 billion Swiss francs ⓘ |
| constructionMethod |
drill and blast
ⓘ
tunnel boring machines ⓘ |
| constructionStartDate | 1999 ⓘ |
| country | Switzerland ⓘ |
| crossesUnder |
Gotthard Massif
ⓘ
linked to:
Saint-Gotthard Massif
|
| designSpeed |
160 km/h for freight trains
ⓘ
250 km/h for passenger trains ⓘ |
| electrification | 15 kV 16.7 Hz AC overhead line ⓘ |
| environmentalGoal | reduce road freight traffic across the Alps ⓘ |
| hasPortal |
north portal at Erstfeld
ⓘ
south portal at Bodio ⓘ |
| length |
57.1 kilometres
ⓘ
approximately 57 kilometres ⓘ |
| locatedIn |
Swiss Alps
ⓘ
canton of Ticino ⓘ
linked to:
Canton of Ticino
canton of Uri ⓘ |
| maximumDepthBelowSurface | about 2300 metres ⓘ |
| numberOfTracks | 2 ⓘ |
| numberOfTubes | 2 ⓘ |
| numberOfTunnelBoringMachinesUsed | 4 ⓘ |
| officialOpeningDate | 1 June 2016 ⓘ |
| operator |
SBB
ⓘ
linked to:
Swiss Federal Railways
Swiss Federal Railways ⓘ |
| owner | Swiss Confederation ⓘ |
| partOf |
European high-speed rail network
ⓘ
linked to:
Trans-European high-speed rail network
NRLA ⓘ New Railway Link through the Alps ⓘ |
| purpose |
enable high-speed passenger services
ⓘ
improve north–south rail traffic through the Alps ⓘ shift freight traffic from road to rail ⓘ |
| rank |
one of the deepest traffic tunnels in the world
ⓘ
one of the longest railway tunnels in the world ⓘ |
| reducesTravelTimeBetween | Zurich and Milan ⓘ |
| replaces | Gotthard Rail Tunnel as primary north–south rail axis ⓘ |
| safetyFeature |
cross passages every 325 metres
ⓘ
emergency stops ⓘ ventilation systems ⓘ |
| startOfRegularService | 11 December 2016 ⓘ |
| trackGauge | standard gauge ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Gotthard Base Tunnel Description of subject: The Gotthard Base Tunnel is a 57-kilometer railway tunnel beneath the Swiss Alps, renowned as one of the world’s longest and deepest traffic tunnels, designed to improve high-speed rail connectivity across Europe.
Referenced by (31)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
linked to: Gotthard Base Tunnel
subject linked to:
Ticino, Switzerland