{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.cattle-grid","code":"thing-q2164694","url":"https://ver.cy/models/thing/q2164694/","name":"cattle grid","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.4","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 barrier set into a road surface consisting of parallel metal or concrete bars over a shallow pit, which vehicles can cross and which is intended to deter hoofed animals such as cattle, sheep and deer, with effectiveness varying by animal, design and condition, used at boundaries of open range, moorland, farms and parks in place of a gate; also called a cattle guard or stock grid, it is a fixed construction with standards for load, spacing and safety.","purpose":"Let an agent explain cattle grids and how they work, relay design standards, installation and effectiveness from highway and agricultural sources, describe uses and alternatives, and distinguish cattle grids from gates, fences and painted virtual grids.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Vehicle passable","Livestock barrier","Pit and bars","Standardised"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a cattle grid is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is a cattle grid, how does it stop livestock, and how does it differ from gates, fences and painted grids?","kind":"definition"},{"text":"Is the question about the device, installation, safety or a specific site?","kind":"boundary"}]}]},{"id":"kinds","name":"Kinds","description":"Kinds.","findings":[{"id":"kinds-finding","name":"Kinds","description":"Kinds.","questions":[{"text":"What are steel, concrete, portable, painted and wildlife grids?","kind":"definition"},{"text":"Which entry fits the specific kind?","kind":"action"}]}]}]},{"id":"install","name":"Install","description":"Design and installation.","layers":[{"id":"standards","name":"Standards","description":"Standards.","findings":[{"id":"standards-finding","name":"Standards","description":"Standards.","questions":[{"text":"What do standards specify for load, bar spacing, pit depth and bypass gates?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"installation","name":"Installation","description":"Installation and maintenance.","findings":[{"id":"installation-finding","name":"Installation","description":"Installation.","questions":[{"text":"How are cattle grids installed and maintained?","kind":"action"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"use","name":"Use","description":"Use and effectiveness.","layers":[{"id":"effectiveness","name":"Effectiveness","description":"Effectiveness.","findings":[{"id":"effectiveness-finding","name":"Effectiveness","description":"Effectiveness.","questions":[{"text":"How effective are cattle grids for different animals, and how do painted grids perform, as studies report?","kind":"provenance"},{"text":"Which entry fits livestock fencing?","kind":"action"}]}]},{"id":"safety","name":"Safety","description":"Safety.","findings":[{"id":"safety-finding","name":"Safety","description":"Safety.","questions":[{"text":"What risks do grids pose to cyclists, horses and wildlife, and how are they mitigated?","kind":"provenance"},{"text":"Which entry fits road safety?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"History and places.","layers":[{"id":"history","name":"History","description":"History.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did cattle grids develop from railway stock guards to road grids?","kind":"provenance"},{"text":"Which entry fits the history of fencing?","kind":"action"}]}]},{"id":"places","name":"Places","description":"Where used.","findings":[{"id":"places-finding","name":"Places","description":"Places.","questions":[{"text":"Where are cattle grids common, from open range in the US to British moorland?","kind":"provenance"},{"text":"Which entry fits open range?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Inspect cattle grids for broken bars, blocked pits and trapped animals and report them.","Explain their use at open range, moorland and park boundaries."],"mustNot":["Remove or cover a cattle grid without the landowner's or highway authority's permission.","Leave a bypass gate open so livestock can escape onto roads.","Leave an animal trapped in a pit without calling for help."],"requiresHuman":["Freeing a trapped animal or closing a road to repair a grid."]},"ethics":{"considerations":["Animals can be injured or trapped in pits; wildlife exits reduce the harm.","Stray livestock on roads cause serious crashes."],"affectedParties":["Livestock and wildlife","Road users","Farmers"]},"owners":{"steward":"The highway authority or landowner where it is installed.","roles":[],"masterSystems":[]},"relations":[{"target":"Q811430","type":"parent","note":"registry parent class"},{"target":"fixed construction","type":"related","note":"in registry terms"},{"target":"fence","type":"related","note":"to enclose land"},{"target":"gate","type":"related","note":"which must be opened"},{"target":"road","type":"related","note":"at land boundaries"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.cattle-grid","Wikidata: Q2164694 (https://www.wikidata.org/wiki/Q2164694)"]},"properties":{"applicability":"required","items":["typical width: about 2.5-4 m - along the road","bar spacing: about 100-150 mm - gaps","UK standard: BS 4008 note"]},"recognition":{"applicability":"required","items":["Bar grid in the road that hooves avoid","Cattle guard, stock grid","A gate must be opened; a fence blocks all traffic; painted grids rely on illusion","A set of parallel bars across the road over a pit."]},"capabilities":{"applicability":"required","items":["explain the design","relay standards and installation","describe uses and alternatives","distinguish related barriers"]},"hazards":{"applicability":"required","items":["Injury to animals with small hooves and to cyclists","Grids filling with debris","Confusing with painted grids"]},"interfaces":{"applicability":"required","items":["BS 4008 and equivalent national standards","Highway authority rules on installation and bypass gates","Animal welfare guidance on grid design"]},"context":{"applicability":"required","items":["Keeping livestock in while letting vehicles pass.","steel cattle grids","concrete cattle grids","temporary and portable grids","painted or virtual cattle grids","wildlife grids for deer"]}},"sources":[{"title":"Wikidata item Q2164694: cattle grid","url":"https://www.wikidata.org/wiki/Q2164694","note":"identity and sense of the item"},{"title":"Wikipedia: Cattle grid","url":"https://en.wikipedia.org/wiki/Cattle_grid","note":"general description of the item"}],"openQuestions":["Should painted cattle grid be a separate entry?","How should highway sources be linked?","How should national naming variants be recorded?"],"resources":{"spec":"/models/things/publications/thing-q2164694/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2164694/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T13:33:52Z","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 2026-10-07T10:10:28+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}