{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.road-junction","code":"thing-q1788454","url":"https://ver.cy/models/thing/q1788454/","name":"road junction","alternateNames":["Offset T-intersection","Borsari's Corner, Melbourne","Right-in/right-out","staggered junction"],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.BLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"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.","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.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Conflict point","Controlled by rules","Capacity-limiting","Safety-critical"],"structure":{"bundles":[{"id":"drive","name":"Drive","description":"Using junctions.","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.","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.","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.","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"}]}]}]}]},"agentConduct":{"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."],"mustNot":["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."],"requiresHuman":["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."],"affectedParties":["Pedestrians and cyclists","Drivers","Residents"]},"owners":{"steward":"The highway authority responsible for the road.","roles":[],"masterSystems":["Road network and asset databases"]},"relations":[{"target":"Q1777515","type":"parent","note":"registry parent class"},{"target":"junction","type":"related","note":"category"},{"target":"road","type":"related","note":"road network"},{"target":"city block","type":"related","note":"urban grid"},{"target":"ford","type":"related","note":"another road feature"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.road-junction","Wikidata: Q1788454 (https://www.wikidata.org/wiki/Q1788454)"]},"properties":{"applicability":"required","items":["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":{"applicability":"required","items":["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":{"applicability":"required","items":["explain junction types and rules","describe design and safety principles","support planning and improvement","identify specific junctions"]},"hazards":{"applicability":"required","items":["Collisions at conflict points","Poor visibility and confusing layouts","Pedestrian and cyclist exposure"]},"interfaces":{"applicability":"required","items":["Road design standards and manuals","Traffic signs and signals conventions","Highway codes on priority"]},"context":{"applicability":"required","items":["Meeting points of roads.","T-junctions and crossroads","staggered and offset junctions","roundabouts","signalised junctions","grade-separated interchanges"]}},"sources":[{"title":"Wikidata item Q1788454: road junction","url":"https://www.wikidata.org/wiki/Q1788454","note":"identity and sense of the item"},{"title":"Wikipedia: Road junction","url":"https://en.wikipedia.org/wiki/Road_junction","note":"general description of the item"}],"openQuestions":["Should roundabouts be a separate entry?","How should design manuals be linked?","How should collision data be linked?"],"resources":{"spec":"/models/things/publications/thing-q1788454/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1788454/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T21:45:44Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:27+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}