MBTA diesel locomotives
E86545
MBTA diesel locomotives are the diesel-powered engines that haul Massachusetts Bay Transportation Authority commuter rail trains on non-electrified routes.
All labels observed (4)
| Label | Occurrences |
|---|---|
| MBTA diesel locomotives canonical | 3 |
| MBTA Commuter Rail diesel locomotives | 1 |
| MBTA Commuter Rail locomotive fleet | 1 |
| MBTA locomotives | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T716363 — 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: MBTA diesel locomotives Context triple: [Haverhill Line, usesRollingStock, MBTA diesel locomotives]
-
A.
MBTA Commuter Rail coaches
MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
-
B.
MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
-
C.
MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
-
D.
MBTA Type 9 Light Rail Vehicle
The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
-
E.
MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
- 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: MBTA diesel locomotives Target entity description: MBTA diesel locomotives are the diesel-powered engines that haul Massachusetts Bay Transportation Authority commuter rail trains on non-electrified routes.
-
A.
MBTA Commuter Rail coaches
MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
-
B.
MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
-
C.
MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
-
D.
MBTA Type 9 Light Rail Vehicle
The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
-
E.
MBTA Commuter Rail network
The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
- F. None of above. chosen
Statements (58)
| Predicate | Object |
|---|---|
| instanceOf | diesel locomotive fleet ⓘ |
| brakeType | air brakes ⓘ |
| controlType | multiple-unit control capable ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| emissionsStandard | EPA Tier 0–Tier 3 (varies by model and rebuild) ⓘ |
| fleetIncludesRebuiltUnits | yes ⓘ |
| fuelCapacity | approximately 1800–2200 gallons (typical range, model-dependent) ⓘ |
| gauge | standard gauge ⓘ |
| hasColorScheme |
MBTA “Phase VI” livery
ⓘ
purple and silver ⓘ |
| hasModel |
EMD F40PH
ⓘ
EMD F40PH ⓘ
surface form:
EMD F40PH-2C
EMD F40PH ⓘ
surface form:
EMD F40PH-3C
F40PH-2D (rebuilt variants, historically) ⓘ GP40MC ⓘ MPI HSP46 ⓘ MPI MP36PH-3C (leased or borrowed units, historically) ⓘ |
| hasNumberingScheme |
1000-series locomotives
ⓘ
1100-series locomotives ⓘ 2000-series locomotives ⓘ 3000-series locomotives ⓘ |
| hauls |
MBTA Commuter Rail coaches
ⓘ
surface form:
MBTA bi-level coaches
MBTA single-level coaches ⓘ |
| headEndPower | yes ⓘ |
| introducedForMBTA | 1970s ⓘ |
| maintainedAt |
Boston Engine Terminal
ⓘ
Readville yard ⓘ |
| maintainedBy |
Keolis
ⓘ
surface form:
Keolis Commuter Services
|
| operator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| owner |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| powerSource | diesel fuel ⓘ |
| primaryUse | commuter rail service ⓘ |
| railNetwork |
MBTA Commuter Rail network
ⓘ
surface form:
MBTA Commuter Rail
|
| regionServed |
Greater Boston
ⓘ
Rhode Island ⓘ eastern Massachusetts ⓘ |
| safetySystem |
Positive Train Control
ⓘ
cab signals on equipped lines ⓘ |
| serviceAreaHub | Boston, Massachusetts ⓘ |
| serviceType | push–pull operation ⓘ |
| topSpeed | approximately 79 mph (typical maximum authorized speed) ⓘ |
| tractionType | diesel-electric ⓘ |
| usedOn |
MBTA Commuter Rail Lowell Line
ⓘ
surface form:
MBTA Commuter Rail north side lines
MBTA Commuter Rail Old Colony Lines ⓘ
surface form:
MBTA Commuter Rail south side lines
non-electrified routes ⓘ |
| usedOnLine |
Fairmount Line
ⓘ
Fitchburg Line ⓘ Framingham/Worcester Line ⓘ Franklin/Foxboro Line ⓘ Greenbush Line ⓘ Haverhill Line ⓘ Kingston Line ⓘ Lowell Line ⓘ Middleborough/Lakeville Line ⓘ Needham Line ⓘ Newburyport/Rockport Line ⓘ Providence/Stoughton Line ⓘ |
| usedWith | control cars ⓘ |
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: MBTA diesel locomotives Description of subject: MBTA diesel locomotives are the diesel-powered engines that haul Massachusetts Bay Transportation Authority commuter rail trains on non-electrified routes.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
MBTA Commuter Rail diesel locomotives
this entity surface form:
MBTA Commuter Rail locomotive fleet