Published
road junction
vr.tr.road-junction · thing-q1788454
Let an agent explain junction types and how to use them, describe design and safety principles, support planning questions with standards, and identify specific junctions with sources.
Thing Registry Physical world and living systems PHY.BLT
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Drive Using junctions.
Rules
Priority and signals.
Rules
Rules.
- What are the priority rules at this type of junction under the local highway code? provenance
- How should a staggered or offset junction be negotiated? provenance
Vulnerable
Pedestrians and cyclists.
Vulnerable
Vulnerable users.
- How should pedestrians and cyclists cross or use this junction safely? provenance
- Which facilities exist? provenance
Design Designing junctions.
Types
Choosing a type.
Types
Types.
- Which junction type suits these traffic volumes, speeds and users, according to design standards? provenance
- How do staggered T-junctions and right-in right-out layouts reduce conflicts? definition
Safety
Safety design.
Safety
Safety.
- Which design features reduce collisions at junctions, according to safety research? provenance
- How is visibility assessed? provenance
Improve Fixing junctions.
Problems
Diagnosing problems.
Problems
Problems.
- What are the documented collision and congestion problems at this junction, and what causes them? provenance
- Which data are available? provenance
Options
Improvement options.
Options
Options.
- Which improvements, such as signals, roundabouts or realignment, address the problems, and how are they evaluated? action
- How can residents raise concerns with the authority? provenance
Learn Specific junctions and history.
Specific
A specific junction.
Specific
Specific junction.
- What is this named junction, and why is it notable? provenance
- Which entry fits it? action
History
History of junction design.
History
History.
- How have junction design and traffic control evolved? provenance
- Which innovations were important? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.BLT
- Other names and narrower kinds
- Offset T-intersection, Borsari's Corner, Melbourne, Right-in/right-out, staggered junction
What it is Filled
A place where two or more roads meet or cross, designed as an at-grade intersection with priority rules, signals or roundabouts, or as a grade-separated interchange, in forms such as T-junctions, crossroads, staggered and offset junctions and restricted right-in right-out layouts; junction design determines capacity and safety and is governed by road design standards.
Why it exists Filled
Let an agent explain junction types and how to use them, describe design and safety principles, support planning questions with standards, and identify specific junctions with sources.
Distinguishing features Filled
- Conflict point
- Controlled by rules
- Capacity-limiting
- Safety-critical
What robots and AI may and may not do Filled
Must not
- Enter a junction against a signal or without yielding priority.
- Block a junction or box so that traffic or emergency vehicles cannot pass.
- Tamper with signals, signs or detectors.
- Present a dangerous junction as safe in route guidance.
Only with a human decision
- Changing signal timings or junction layout.
May
- Report a junction's layout, signals and rules from road authority data.
- Drive through junctions following priority rules and signals when authorized to drive.
Moral aspects Filled
- Junctions are where most urban collisions happen, and pedestrians bear the worst harm.
- Design choices decide whether children and older people can cross safely.
Who is affected
- Pedestrians and cyclists
- Drivers
- Residents
Owners Filled
Steward
The highway authority responsible for the road.
Master systems
- Road network and asset databases
Links to other meta-models Filled
parent
- Q1777515 - registry parent class
related
- junction - category
- road - road network
- city block - urban grid
- ford - another road feature
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.road-junction
- Wikidata: Q1788454 (https://www.wikidata.org/wiki/Q1788454)
Direct properties required Filled
- Approach carriageway width: m - Measure perpendicular to the road alignment between carriageway edges at a specified approach location.
- Intersection angle: degrees - Measure the angle between the local centerline directions of two specified intersecting road approaches.
- Approach gradient: % - Measure elevation change divided by horizontal distance along a specified approach segment and express it as a percentage.
- Available sight distance: m - Measure the unobstructed viewing distance for a specified movement using stated observer and target positions and heights.
Recognition required Filled
- Two or more roads meet
- Priority, signals or roundabout
- A crossing for pedestrians only is not a road junction
- Roads meeting with markings, signs, signals or a roundabout.
Capabilities and actions required Filled
- explain junction types and rules
- describe design and safety principles
- support planning and improvement
- identify specific junctions
Hazards and failure modes required Filled
- Collisions at conflict points
- Poor visibility and confusing layouts
- Pedestrian and cyclist exposure
Standards and interfaces required Filled
- Road design standards and manuals
- Traffic signs and signals conventions
- Highway codes on priority
Context of use required Filled
- Meeting points of roads.
- T-junctions and crossroads
- staggered and offset junctions
- roundabouts
- signalised junctions
- grade-separated interchanges
Sources Filled
- Wikidata item Q1788454: road junction - identity and sense of the item
- Wikipedia: Road junction - general description of the item
Open questions
- Should roundabouts be a separate entry?
- How should design manuals be linked?
- How should collision data be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1788454/spec.json