Hindhead Tunnel
E102499
Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Hindhead Tunnel canonical | 3 |
| A3 Hindhead Tunnel | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T848487 — 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: Hindhead Tunnel Context triple: [A3 road, hasStructure, Hindhead Tunnel]
-
A.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
B.
Severn Tunnel
Severn Tunnel is a major railway tunnel in the United Kingdom that runs beneath the River Severn, linking South West England with South Wales.
-
C.
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.
-
D.
Standedge tunnels
The Standedge Tunnels are a historic series of canal and railway tunnels piercing the Pennines in northern England, known as some of the longest and highest transport tunnels in the UK.
-
E.
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.
- 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: Hindhead Tunnel Target entity description: Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
-
A.
Dartford Tunnel
The Dartford Tunnel is a major road tunnel under the River Thames in southeast England, forming part of a key river crossing on the London orbital route.
-
B.
Severn Tunnel
Severn Tunnel is a major railway tunnel in the United Kingdom that runs beneath the River Severn, linking South West England with South Wales.
-
C.
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.
-
D.
Standedge tunnels
The Standedge Tunnels are a historic series of canal and railway tunnels piercing the Pennines in northern England, known as some of the longest and highest transport tunnels in the UK.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
highway tunnel
ⓘ
road tunnel ⓘ |
| builtFor |
improving traffic flow on the A3
ⓘ
reducing congestion in Hindhead ⓘ reducing environmental impact on Devil’s Punch Bowl ⓘ |
| carriagewayType | dual carriageway ⓘ |
| category |
Road tunnels in England
ⓘ
Tunnels in Surrey ⓘ |
| connects |
London-bound A3 carriageway
ⓘ
Portsmouth-bound A3 carriageway ⓘ |
| constructionCost | approximately £371 million ⓘ |
| constructionMethod | bored tunnel ⓘ |
| constructionStartDate | 2007 ⓘ |
| country | United Kingdom ⓘ |
| environmentalBenefit |
improved air quality around Devil’s Punch Bowl
ⓘ
reduced noise pollution on Hindhead Common ⓘ reduced traffic through Hindhead village ⓘ |
| hasEmergencyExits | yes ⓘ |
| hasFeature |
CCTV monitoring
ⓘ
cross passages between bores ⓘ emergency lay-bys ⓘ fire safety systems ⓘ ventilation systems ⓘ |
| hasLighting | yes ⓘ |
| length |
approximately 1.1 miles
ⓘ
approximately 1.8 kilometres ⓘ |
| locatedIn |
England
ⓘ
Surrey ⓘ |
| locatedNear | Hindhead ⓘ |
| maintainedBy | National Highways ⓘ |
| maximumSpeedLimit | 70 mph ⓘ |
| nearbyProtectedArea |
Devil’s Punch Bowl Site of Special Scientific Interest
ⓘ
linked to:
Devil's Punch Bowl
Hindhead Common National Trust land ⓘ |
| numberOfLanesPerTube | 2 ⓘ |
| numberOfTubes | 2 ⓘ |
| openedToTraffic | 2011 ⓘ |
| openingDate | 2011 ⓘ |
| operator | National Highways ⓘ |
| owner |
UK Government
ⓘ
linked to:
UK government
|
| partOf | A3 London–Portsmouth route ⓘ |
| passesUnder |
Devil’s Punch Bowl
ⓘ
linked to:
Devil's Punch Bowl
Hindhead Common ⓘ |
| region | South East England ⓘ |
| replaced | former A3 surface route past Devil’s Punch Bowl ⓘ |
| roadCarried | A3 road ⓘ |
| trafficType | motor vehicles ⓘ |
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: Hindhead Tunnel Description of subject: Hindhead Tunnel is a major road tunnel in Surrey, England, carrying the A3 beneath the Devil’s Punch Bowl to improve traffic flow and reduce environmental impact on the surrounding countryside.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.