Highway Capacity Manual
E521683
The Highway Capacity Manual is a foundational transportation engineering reference that provides methodologies for analyzing and estimating the capacity, quality of service, and operational performance of roadway and transportation facilities.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Highway Capacity Manual canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5449029 — 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: Highway Capacity Manual Context triple: [AASHTO Highway Safety Manual, relatedTo, Highway Capacity Manual]
-
A.
AASHTO Highway Safety Manual
The AASHTO Highway Safety Manual is a foundational reference that provides data-driven methods and tools for predicting, evaluating, and improving roadway safety performance in transportation engineering and planning.
-
B.
A Policy on Geometric Design of Highways and Streets
A Policy on Geometric Design of Highways and Streets is a key engineering reference manual that sets widely used standards and guidelines for the geometric design of roads and streets in the United States.
-
C.
National Cooperative Highway Research Program
The National Cooperative Highway Research Program is a U.S. research initiative that develops practical, implementable solutions to improve the design, construction, operation, and maintenance of the nation’s highways.
-
D.
Planning, Programming and Modal Division of the Iowa Department of Transportation
The Planning, Programming and Modal Division of the Iowa Department of Transportation is the branch responsible for statewide transportation planning, project programming, and coordination of various transportation modes across Iowa.
-
E.
Highway Safety Improvement Program guidance
Highway Safety Improvement Program guidance is a set of federal guidelines and best practices that help transportation agencies plan, implement, and evaluate roadway safety improvements to reduce traffic fatalities and serious injuries.
- 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: Highway Capacity Manual Target entity description: The Highway Capacity Manual is a foundational transportation engineering reference that provides methodologies for analyzing and estimating the capacity, quality of service, and operational performance of roadway and transportation facilities.
-
A.
AASHTO Highway Safety Manual
The AASHTO Highway Safety Manual is a foundational reference that provides data-driven methods and tools for predicting, evaluating, and improving roadway safety performance in transportation engineering and planning.
-
B.
A Policy on Geometric Design of Highways and Streets
A Policy on Geometric Design of Highways and Streets is a key engineering reference manual that sets widely used standards and guidelines for the geometric design of roads and streets in the United States.
-
C.
National Cooperative Highway Research Program
The National Cooperative Highway Research Program is a U.S. research initiative that develops practical, implementable solutions to improve the design, construction, operation, and maintenance of the nation’s highways.
-
D.
Planning, Programming and Modal Division of the Iowa Department of Transportation
The Planning, Programming and Modal Division of the Iowa Department of Transportation is the branch responsible for statewide transportation planning, project programming, and coordination of various transportation modes across Iowa.
-
E.
Highway Safety Improvement Program guidance
Highway Safety Improvement Program guidance is a set of federal guidelines and best practices that help transportation agencies plan, implement, and evaluate roadway safety improvements to reduce traffic fatalities and serious injuries.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
engineering standard
ⓘ
technical manual ⓘ transportation engineering reference ⓘ |
| appliesTo |
bicycle facilities
ⓘ
freeways ⓘ interchanges ⓘ multilane highways ⓘ pedestrian facilities ⓘ roundabouts ⓘ signalized intersections ⓘ transit facilities ⓘ two-lane highways ⓘ unsignalized intersections ⓘ urban streets ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| definesConcept |
capacity
ⓘ
control delay ⓘ level of service ⓘ service flow rate ⓘ v/c ratio ⓘ |
| edition |
HCM 1950
ⓘ
HCM 1965 ⓘ HCM 1985 ⓘ HCM 2000 ⓘ HCM 2010 ⓘ HCM 6th Edition ⓘ HCM 7th Edition ⓘ |
| field |
traffic engineering
ⓘ
transportation engineering ⓘ |
| firstEditionPublicationYear | 1950 ⓘ |
| hasMethodologyType |
deterministic analysis procedures
ⓘ
multimodal level of service analysis ⓘ simulation-based analysis guidance ⓘ |
| influences |
highway design standards in the United States
ⓘ
traffic analysis software methodologies ⓘ |
| language | English ⓘ |
| mainSubject |
highway capacity analysis
ⓘ
operational performance of transportation facilities ⓘ quality of service ⓘ |
| publishedBy |
National Academies of Sciences, Engineering, and Medicine
ⓘ
Transportation Research Board ⓘ |
| publisherType | professional organization ⓘ |
| targetAudience |
highway agencies
ⓘ
traffic engineers ⓘ transportation engineers ⓘ transportation planners ⓘ |
| usedFor |
highway design
ⓘ
safety and performance evaluation ⓘ traffic operations analysis ⓘ transportation planning ⓘ |
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: Highway Capacity Manual Description of subject: The Highway Capacity Manual is a foundational transportation engineering reference that provides methodologies for analyzing and estimating the capacity, quality of service, and operational performance of roadway and transportation facilities.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.