{
 "schemaVersion": "1.0.0",
 "constitutionVersion": "1.0.0",
 "createdAt": "2026-08-12T00:00:00Z",
 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
 "entity": {
  "type": "project",
  "id": "oslo-air-quality-monitoring",
  "title": "Real-Time Air Quality Monitoring and Oslo's Once-Fired Diesel Ban",
  "canonicalUrl": "https://1001smartcities.org/projects/oslo-air-quality-monitoring/"
 },
 "currentRevisionId": "2026-08-20-source-dates",
 "revisions": [
  {
   "id": "2026-08-20-source-dates",
   "createdAt": "2026-08-20T19:03:10Z",
   "effectiveAt": "2026-08-04",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 1 claim and 8 source dossiers.",
   "preparedBy": {
    "type": "automation",
    "label": "AI-assisted evidence preparation",
    "humanApproved": false
   },
   "review": {
    "status": "unreviewed",
    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
   "changes": [
    {
     "operation": "add",
     "path": "/evidencePassport",
     "summary": "Added claim-level evidence mapping and source dossiers."
    },
    {
     "operation": "add",
     "path": "/revisionHistory",
     "summary": "Established a permanent, hash-addressed baseline revision."
    }
   ],
   "snapshotHash": "sha256:317074dad4000188540335a2d60268675b95bef540f07abcac7bf4ad9cf13d47",
   "snapshot": {
    "asOf": "2026-08-04",
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    "assurance": {
     "status": "unreviewed",
     "scope": "evidence-passport-revision",
     "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.",
     "machineChecks": [
      "schema",
      "publication-diff-contract",
      "material-project-fingerprint",
      "claim-text-drift",
      "source-reference-resolution",
      "complete-source-dossier",
      "snapshot-hash"
     ]
    },
    "projectState": {
     "status": "live",
     "outcome": "ongoing",
     "evidenceGrade": "peer-reviewed",
     "timeline": {
      "started": 2016,
      "ended": null
     }
    },
    "governance": {
     "operator": "Bymiljøetaten (City of Oslo) and Statens vegvesen operate the monitoring stations; NILU runs the public data platform.",
     "actorTypes": [
      "city-government",
      "national-government",
      "research"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-bf0e9c0db79c7390",
      "field": "impact",
      "text": "A peer-reviewed evaluation of the 2004-2015 speed-limit cuts found no measurable drop in roadside pollution despite slower traffic.",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-d0c3924cb71682bf"
      ],
      "supportNote": "This is the peer-reviewed study's own null finding on Oslo's winter speed-limit reductions.",
      "caveat": "The null result concerns the fixed-calendar speed limit only, not the studded-tyre fee or the diesel-ban trigger described elsewhere in the entry.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-60e658bb2547d424",
      "title": "City of Oslo — Temporary Ban on Diesel Vehicles (official, English)",
      "url": "https://www.oslo.kommune.no/english/street-transport-and-parking/temporary-ban-on-diesel-vehicles/",
      "publisher": {
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       "classification": "not-classified"
      },
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      "language": "und",
      "role": "background",
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       "recordLastVerifiedAt": "2026-08-04",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Trigger conditions (high pollution, large area, 2+ days), the 24-hour notice requirement, and confirmation that no ban is currently in force.",
       "exact": false
      },
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     {
      "id": "src-e0c1cc04174292e0",
      "title": "City of Oslo — Effekt og historikk om dieselforbud (official)",
      "url": "https://www.oslo.kommune.no/gate-transport-og-parkering/dieselforbud/effekt-og-historikk-om-dieselforbud",
      "publisher": {
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       "domain": "oslo.kommune.no",
       "classification": "not-classified"
      },
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      "language": "und",
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       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "States the ban has been imposed only once, on 17 January 2017, despite roughly seven qualifying high-pollution episodes over the preceding 15 years.",
       "exact": false
      },
      "preservation": {
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     },
     {
      "id": "src-7e36826c9889712b",
      "title": "Lovdata — Forskrift om midlertidig trafikkregulerende tiltak ved høy luftforurensning, Oslo kommune",
      "url": "https://lovdata.no/dokument/LF/forskrift/2016-12-01-1424",
      "publisher": {
       "name": null,
       "domain": "lovdata.no",
       "classification": "not-classified"
      },
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      "language": "und",
      "role": "background",
      "claimRefs": [],
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       "publishedAt": "2016-12-01",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-04",
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       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The regulation itself, adopted by Oslo bystyre on 1 December 2016 under the Road Traffic Act §7; the legal basis for the diesel-ban trigger.",
       "exact": false
      },
      "preservation": {
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       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-a93d8084a995cfde",
      "title": "City of Oslo — Air quality statistics (official, English)",
      "url": "https://www.oslo.kommune.no/english/statistics/environment-status/air-quality-statistics/",
      "publisher": {
       "name": null,
       "domain": "oslo.kommune.no",
       "classification": "not-classified"
      },
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      "language": "und",
      "role": "background",
      "claimRefs": [],
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       "recordLastVerifiedAt": "2026-08-04",
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       "retrievedAt": null,
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      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "NO2 has not exceeded the limit value in Oslo since 2017; also lists the vehicle-side measures (studded-tyre fee, environmental speed limit, road-dust prevention).",
       "exact": false
      },
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     },
     {
      "id": "src-6eb6d17995e08142",
      "title": "City of Oslo — Luftkvalitet i Oslo (official)",
      "url": "https://www.oslo.kommune.no/gate-transport-og-parkering/luftkvalitet-i-oslo/",
      "publisher": {
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       "classification": "not-classified"
      },
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      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The measurement programme: 13 stations, 8 owned by the city's Bymiljøetaten and 5 by Statens vegvesen, measuring PM10, PM2.5, NO2 and ozone.",
       "exact": false
      },
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     {
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      "title": "Folgerø, Harding & Westby — \"Going fast or going green? Evidence from environmental speed limits in Norway\", Transportation Research Part D (2020)",
      "url": "https://www.sciencedirect.com/science/article/pii/S1361920919314002",
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       "domain": "sciencedirect.com",
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      "locator": {
       "type": "descriptive-source-note",
       "value": "Peer-reviewed evaluation of Oslo's 2004-2015 winter speed-limit reductions: slower travel speeds, but no measurable drop in roadside air pollution.",
       "exact": false
      },
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     },
     {
      "id": "src-df2bf78e9ec395ef",
      "title": "Miljødirektoratet / NTB — \"Fleire kommunar braut grenseverdiane for svevestøv i 2025\"",
      "url": "https://kommunikasjon.ntb.no/pressemelding/18861754/fleire-kommunar-braut-grenseverdiane-for-svevestov-i-2025",
      "publisher": {
       "name": null,
       "domain": "kommunikasjon.ntb.no",
       "classification": "not-classified"
      },
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      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2026-04-16",
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      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Norway's environment agency confirms Oslo breached the national annual limit values for PM10 and PM2.5 in 2025.",
       "exact": false
      },
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       "status": "not-captured"
      }
     },
     {
      "id": "src-222a910238cd61b4",
      "title": "City of Oslo — Studded Tyre Fee (official, English)",
      "url": "https://www.oslo.kommune.no/english/street-transport-and-parking/studded-tyre-fee/",
      "publisher": {
       "name": null,
       "domain": "oslo.kommune.no",
       "classification": "not-classified"
      },
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      "role": "background",
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      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "The fee runs on a fixed 1 November-4 April calendar regardless of the day's measured pollution — cited here to show it is NOT a real-time trigger.",
       "exact": false
      },
      "preservation": {
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      }
     }
    ],
    "coverage": {
     "claimsTotal": 1,
     "claimsMapped": 1,
     "sourcesTotal": 8,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 2,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "Publisher names and source languages have not yet been classified; domains are recorded without guessing.",
     "Existing source notes are descriptive locators, not page- or paragraph-exact citations.",
     "A missing archive, publication date or content hash is shown as null rather than inferred.",
     "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim."
    ]
   }
  }
 ]
}