Sydney Harbour Tunnel
E153962
The Sydney Harbour Tunnel is an underwater road tunnel in Sydney, Australia, that carries vehicular traffic beneath Sydney Harbour between the central business district and the North Shore.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sydney Harbour Tunnel canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1326805 — 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: Sydney Harbour Tunnel Context triple: [Sydney Harbour Bridge, parallelStructure, Sydney Harbour Tunnel]
-
A.
Sydney Harbour Bridge
The Sydney Harbour Bridge is an iconic steel arch bridge in Sydney, Australia, renowned for its massive span across Sydney Harbour and its status as a national symbol.
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B.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
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C.
Auckland Harbour Bridge
The Auckland Harbour Bridge is a major steel arch bridge in Auckland, New Zealand, that spans the Waitematā Harbour and serves as a key transport link and city landmark.
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D.
Queensway Tunnel
The Queensway Tunnel is a road tunnel in northwest England that carries vehicular traffic beneath the River Mersey between Liverpool and the Wirral Peninsula.
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E.
Mersey Tunnels
The Mersey Tunnels are a set of road and rail tunnels linking Liverpool with the Wirral Peninsula beneath the River Mersey in northwest England.
- 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: Sydney Harbour Tunnel Target entity description: The Sydney Harbour Tunnel is an underwater road tunnel in Sydney, Australia, that carries vehicular traffic beneath Sydney Harbour between the central business district and the North Shore.
-
A.
Sydney Harbour Bridge
The Sydney Harbour Bridge is an iconic steel arch bridge in Sydney, Australia, renowned for its massive span across Sydney Harbour and its status as a national symbol.
-
B.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
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C.
Auckland Harbour Bridge
The Auckland Harbour Bridge is a major steel arch bridge in Auckland, New Zealand, that spans the Waitematā Harbour and serves as a key transport link and city landmark.
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D.
Queensway Tunnel
The Queensway Tunnel is a road tunnel in northwest England that carries vehicular traffic beneath the River Mersey between Liverpool and the Wirral Peninsula.
-
E.
Mersey Tunnels
The Mersey Tunnels are a set of road and rail tunnels linking Liverpool with the Wirral Peninsula beneath the River Mersey in northwest England.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
road tunnel
ⓘ
transport infrastructure ⓘ undersea tunnel ⓘ |
| carries | vehicular traffic ⓘ |
| connects |
North Shore
ⓘ
Sydney central business district ⓘ |
| constructionMethod | immersed tube tunnel ⓘ |
| constructionStartDate | 1988 ⓘ |
| country | Australia ⓘ |
| crosses | Sydney Harbour ⓘ |
| designedFor | motor vehicles only ⓘ |
| doesNotCarry |
bicycles
ⓘ
pedestrians ⓘ rail traffic ⓘ |
| hasEmergencyExits | yes ⓘ |
| hasNumberOfLanes | 4 ⓘ |
| hasSafetySystems |
CCTV monitoring
ⓘ
emergency telephones ⓘ fire detection ⓘ fire suppression ⓘ variable message signs ⓘ |
| hasSpeedLimit | yes ⓘ |
| hasTollCollection | electronic tolling ⓘ |
| hasVentilationSystem | yes ⓘ |
| laneConfiguration | 2 lanes in each direction ⓘ |
| length | approximately 2.3 kilometres ⓘ |
| locatedIn |
New South Wales
ⓘ
Sydney ⓘ |
| notableFeature | one of the main road crossings of Sydney Harbour ⓘ |
| openedForTrafficInYear | 1992 ⓘ |
| openingDate | 1992 ⓘ |
| operator | Sydney Harbour Tunnel Company ⓘ |
| owner | Government of New South Wales ⓘ |
| parallelTo | Sydney Harbour Bridge ⓘ |
| partOf |
Harbour crossings in Sydney
ⓘ
Sydney road network ⓘ |
| passesUnder | Sydney Harbour seabed ⓘ |
| purpose | relieve congestion on Sydney Harbour Bridge ⓘ |
| regionServed |
Greater Sydney region
ⓘ
surface form:
Greater Sydney
|
| roadType | motorway ⓘ |
| speedLimit | generally 80 km/h ⓘ |
| toll | yes ⓘ |
| tollAppliesTo | motor vehicles ⓘ |
| trafficDirection | bidirectional ⓘ |
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: Sydney Harbour Tunnel Description of subject: The Sydney Harbour Tunnel is an underwater road tunnel in Sydney, Australia, that carries vehicular traffic beneath Sydney Harbour between the central business district and the North Shore.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.