{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T21:45:44Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 2, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-05T23:50:00Z", "ingestedAt": "2026-10-05T20:49:36+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:27+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q1788454", "registryId": "vr.tr.road-junction", "name": "road junction", "version": "0.2.0-wave.2", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.BLT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q1788454/", "model": { "registry_id": "vr.tr.road-junction", "name": "road junction", "purpose": "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.", "definition": "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.", "what_it_is_for": "Meeting points of roads.", "affordances": [ "explain junction types and rules", "describe design and safety principles", "support planning and improvement", "identify specific junctions" ], "distinguishing_features": [ "Conflict point", "Controlled by rules", "Capacity-limiting", "Safety-critical" ], "appearance": "Roads meeting with markings, signs, signals or a roundabout.", "visual_identification": [ "Two or more roads meet", "Priority, signals or roundabout", "A crossing for pedestrians only is not a road junction" ], "physical_properties": [ { "quantity": "Approach carriageway width", "unit": "m", "typical_range": "", "note": "Measure perpendicular to the road alignment between carriageway edges at a specified approach location." }, { "quantity": "Intersection angle", "unit": "degrees", "typical_range": "", "note": "Measure the angle between the local centerline directions of two specified intersecting road approaches." }, { "quantity": "Approach gradient", "unit": "%", "typical_range": "", "note": "Measure elevation change divided by horizontal distance along a specified approach segment and express it as a percentage." }, { "quantity": "Available sight distance", "unit": "m", "typical_range": "", "note": "Measure the unobstructed viewing distance for a specified movement using stated observer and target positions and heights." } ], "families_and_kinds": [ "T-junctions and crossroads", "staggered and offset junctions", "roundabouts", "signalised junctions", "grade-separated interchanges" ], "related_models": [ { "relation": "is a kind of", "target": "junction", "why": "category" }, { "relation": "is part of", "target": "road", "why": "road network" }, { "relation": "is related to", "target": "city block", "why": "urban grid" }, { "relation": "is related to", "target": "ford", "why": "another road feature" } ], "identifiers": [], "standards_and_regulation": [ "Road design standards and manuals", "Traffic signs and signals conventions", "Highway codes on priority" ], "failure_modes_and_hazards": [ "Collisions at conflict points", "Poor visibility and confusing layouts", "Pedestrian and cyclist exposure" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "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." ], "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." ], "requires_human": [ "Changing signal timings or junction layout." ] }, "ethics": { "considerations": [ "Junctions are where most urban collisions happen, and pedestrians bear the worst harm.", "Design choices decide whether children and older people can cross safely." ], "affected_parties": [ "Pedestrians and cyclists", "Drivers", "Residents" ] }, "owners": { "steward": "The highway authority responsible for the road.", "master_systems": [ "Road network and asset databases" ] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q1788454: road junction", "url": "https://www.wikidata.org/wiki/Q1788454", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Road junction", "url": "https://en.wikipedia.org/wiki/Road_junction", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "drive", "name": "Drive", "description": "Using junctions.", "rationale": "Rules.", "layers": [ { "id": "rules", "name": "Rules", "description": "Priority and signals.", "findings": [ { "id": "rules-finding", "name": "Rules", "description": "Rules.", "questions": [ { "text": "What are the priority rules at this type of junction under the local highway code?", "kind": "provenance" }, { "text": "How should a staggered or offset junction be negotiated?", "kind": "provenance" } ] } ] }, { "id": "vulnerable", "name": "Vulnerable", "description": "Pedestrians and cyclists.", "findings": [ { "id": "vulnerable-finding", "name": "Vulnerable", "description": "Vulnerable users.", "questions": [ { "text": "How should pedestrians and cyclists cross or use this junction safely?", "kind": "provenance" }, { "text": "Which facilities exist?", "kind": "provenance" } ] } ] } ] }, { "id": "design", "name": "Design", "description": "Designing junctions.", "rationale": "Engineering.", "layers": [ { "id": "types", "name": "Types", "description": "Choosing a type.", "findings": [ { "id": "types-finding", "name": "Types", "description": "Types.", "questions": [ { "text": "Which junction type suits these traffic volumes, speeds and users, according to design standards?", "kind": "provenance" }, { "text": "How do staggered T-junctions and right-in right-out layouts reduce conflicts?", "kind": "definition" } ] } ] }, { "id": "safety", "name": "Safety", "description": "Safety design.", "findings": [ { "id": "safety-finding", "name": "Safety", "description": "Safety.", "questions": [ { "text": "Which design features reduce collisions at junctions, according to safety research?", "kind": "provenance" }, { "text": "How is visibility assessed?", "kind": "provenance" } ] } ] } ] }, { "id": "improve", "name": "Improve", "description": "Fixing junctions.", "rationale": "Interventions.", "layers": [ { "id": "problems", "name": "Problems", "description": "Diagnosing problems.", "findings": [ { "id": "problems-finding", "name": "Problems", "description": "Problems.", "questions": [ { "text": "What are the documented collision and congestion problems at this junction, and what causes them?", "kind": "provenance" }, { "text": "Which data are available?", "kind": "provenance" } ] } ] }, { "id": "options", "name": "Options", "description": "Improvement options.", "findings": [ { "id": "options-finding", "name": "Options", "description": "Options.", "questions": [ { "text": "Which improvements, such as signals, roundabouts or realignment, address the problems, and how are they evaluated?", "kind": "action" }, { "text": "How can residents raise concerns with the authority?", "kind": "provenance" } ] } ] } ] }, { "id": "learn", "name": "Learn", "description": "Specific junctions and history.", "rationale": "Context.", "layers": [ { "id": "specific", "name": "Specific", "description": "A specific junction.", "findings": [ { "id": "specific-finding", "name": "Specific", "description": "Specific junction.", "questions": [ { "text": "What is this named junction, and why is it notable?", "kind": "provenance" }, { "text": "Which entry fits it?", "kind": "action" } ] } ] }, { "id": "history", "name": "History", "description": "History of junction design.", "findings": [ { "id": "history-finding", "name": "History", "description": "History.", "questions": [ { "text": "How have junction design and traffic control evolved?", "kind": "provenance" }, { "text": "Which innovations were important?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Should roundabouts be a separate entry?", "How should design manuals be linked?", "How should collision data be linked?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }