Central Artery/Tunnel Project

E310522

highway project infrastructure megaproject transportation project tunnel project urban redevelopment project

The Central Artery/Tunnel Project, commonly known as the "Big Dig," was a massive Boston infrastructure megaproject that rerouted the city’s central highway into tunnels to reduce congestion and reclaim urban space.

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All labels observed (8)

Label	Occurrences
Central Artery/Tunnel Project canonical	9
Big Dig project	2
Central Artery/Tunnel	2
Boston Central Artery/Tunnel Project	1
Boston’s Central Artery/Tunnel Project	1
Central Artery/Tunnel Project redevelopment	1
Central Artery/Tunnel Project redevelopment area	1
Southwest Corridor project	1

How this entity was disambiguated

This entity first appeared as the object of triple T2925519 — 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: Central Artery/Tunnel Project
Context triple: [Ted Williams Tunnel, partOf, Central Artery/Tunnel Project]

A. Center City Tunnel
Center City Tunnel is an underground rail corridor in downtown Philadelphia that links several major commuter rail lines to create a unified through-running system.
B. Peninsula rail corridor
The Peninsula rail corridor is the major rail line running through California’s San Francisco Peninsula, carrying both commuter and intercity trains between San Francisco and the South Bay.
C. Alameda Corridor
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
D. Eisenhower–Johnson Memorial Tunnel
The Eisenhower–Johnson Memorial Tunnel is a high-altitude vehicular tunnel through the Rocky Mountains in Colorado, carrying Interstate 70 beneath the Continental Divide.
E. Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
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: Central Artery/Tunnel Project
Target entity description: The Central Artery/Tunnel Project, commonly known as the "Big Dig," was a massive Boston infrastructure megaproject that rerouted the city’s central highway into tunnels to reduce congestion and reclaim urban space.

A. Center City Tunnel
Center City Tunnel is an underground rail corridor in downtown Philadelphia that links several major commuter rail lines to create a unified through-running system.
B. Peninsula rail corridor
The Peninsula rail corridor is the major rail line running through California’s San Francisco Peninsula, carrying both commuter and intercity trains between San Francisco and the South Bay.
C. Alameda Corridor
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
D. Eisenhower–Johnson Memorial Tunnel
The Eisenhower–Johnson Memorial Tunnel is a high-altitude vehicular tunnel through the Rocky Mountains in Colorado, carrying Interstate 70 beneath the Continental Divide.
E. Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
F. None of above. chosen

Statements (58)

Predicate	Object
instanceOf	highway project ⓘ infrastructure megaproject ⓘ transportation project ⓘ tunnel project ⓘ urban redevelopment project ⓘ
benefit	creation of new public open space ⓘ improved access to Logan International Airport ⓘ improved connections between I-90 and I-93 ⓘ shorter travel times through downtown Boston ⓘ
cityPartner	City of Boston ⓘ linked to: Boston, Massachusetts
constructionMethod	cut-and-cover tunneling ⓘ immersed tube tunneling under Boston Harbor ⓘ
constructionStartDate	1991 ⓘ
controversy	construction defects and leaks ⓘ cost overruns ⓘ political and legal disputes ⓘ safety concerns ⓘ
country	United States ⓘ linked to: United States of America
createdUrbanSpace	Rose Kennedy Greenway ⓘ
criticizedFor	large public debt burden ⓘ management and oversight problems ⓘ
engineeringChallenge	construction under an active city with minimal traffic disruption ⓘ tunneling through soft soils and fill near Boston Harbor ⓘ
environmentalImpact	improved air quality in central Boston ⓘ reduced surface traffic congestion in downtown Boston ⓘ
estimatedCostAtApproval	approximately 2.6 billion US dollars ⓘ
federalPartner	Federal Highway Administration ⓘ
finalCost	over 14 billion US dollars ⓘ
financingMethod	federal highway funds ⓘ state funds ⓘ
hasAlias	Big Dig ⓘ CA/T Project ⓘ linked to: CA/T
includesHighway	Interstate 90 ⓘ
includesStructure	Fort Point Channel Tunnel ⓘ Ted Williams Tunnel ⓘ linked to: Ted Williams Tunnel (Boston) Thomas P. O’Neill Jr. Tunnel ⓘ linked to: O'Neill Tunnel Zakim Bunker Hill Bridge ⓘ linked to: Zakim Bridge
locatedIn	Boston ⓘ linked to: Boston, Massachusetts Massachusetts ⓘ United States ⓘ linked to: United States of America
majorOpeningDate	2003 ⓘ
managingAgency	Massachusetts Highway Department ⓘ linked to: Massachusetts Department of Transportation Massachusetts Turnpike Authority ⓘ
namedAfter	Central Artery ⓘ
notableFeature	created new surface parks and boulevards ⓘ one of the most expensive highway projects in US history ⓘ placed major downtown highway traffic underground ⓘ
officialCompletionDate	2007 ⓘ
planningStartDate	1982 ⓘ
primaryHighway	Interstate 93 ⓘ
purpose	reclaim urban space for parks and development ⓘ reduce traffic congestion in downtown Boston ⓘ reroute central highway traffic into tunnels ⓘ
region	New England ⓘ
replacedStructure	elevated Central Artery ⓘ
safetyIncident	2006 tunnel ceiling collapse ⓘ
servesCity	Boston ⓘ
substantialCompletionDate	2007 ⓘ

How these facts were elicited

Referenced by (18)

Full triples — surface form annotated when it differs from this entity's canonical label.

Ted Williams Tunnel → partOf → Central Artery/Tunnel Project ⓘ

subject linked to: Ted Williams Tunnel (Boston)

Roxbury Crossing station → rebuildRelatedTo → Southwest Corridor project ⓘ