{
 "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": "guangzhou-brt",
  "title": "Guangzhou Bus Rapid Transit Corridor",
  "canonicalUrl": "https://1001smartcities.org/projects/guangzhou-brt/"
 },
 "currentRevisionId": "2026-08-20-source-dates",
 "revisions": [
  {
   "id": "2026-08-20-source-dates",
   "createdAt": "2026-08-20T19:29:52Z",
   "effectiveAt": "2026-08-06",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 1 claim and 4 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": "sha256:0a117125a60947363f9b9a521f8c869283e540245aae6444776f8b0571c01aba",
   "snapshot": {
    "asOf": "2026-08-06",
    "projectFingerprint": "sha256:604af171d29614d88372f51e4d95cc23dca01936530d8e529b0023c7fc7fa8b9",
    "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": "succeeded",
     "evidenceGrade": "independent",
     "timeline": {
      "started": 2010,
      "ended": null
     }
    },
    "governance": {
     "operator": "Guangzhou Bus Rapid Transit / Guangzhou Public Transport Group",
     "actorTypes": [
      "utility"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-8736dc43de49b901",
      "field": "impact",
      "text": "travel times improved 29% for bus riders and 20% for motorists, plus ~86,000 tonnes CO2 avoided per year",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-15b16ad0522fe094"
      ],
      "supportNote": null,
      "caveat": "The 2011 evaluation reports improvements in travel time, not in speed, and no independent re-evaluation has updated it since; current ridership of roughly 1 million a day is an operator figure.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-fd337ab19f62e86d",
      "title": "ITDP (independent)",
      "url": "https://itdp.org/2011/08/17/guangzhou-brt-reduces-co2-emissions-by-86000-tonnes-annually/",
      "publisher": {
       "name": null,
       "domain": "itdp.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2011-08-17",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Independent evaluation: ~86,000 tonnes CO2 avoided annually; methodology and monitoring described.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": "https://web.archive.org/web/20260607224851/https://itdp.org/2011/08/17/guangzhou-brt-reduces-co2-emissions-by-86000-tonnes-annually/",
       "archivedAt": "2026-06-07",
       "contentHash": null,
       "status": "archive-linked"
      }
     },
     {
      "id": "src-15b16ad0522fe094",
      "title": "ITDP (independent)",
      "url": "https://itdp.org/2011/01/25/guangzhou-wins-2011-sustainable-transport-award-for-innovative-transport-solutions/",
      "publisher": {
       "name": null,
       "domain": "itdp.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-8736dc43de49b901"
      ],
      "temporal": {
       "publishedAt": "2011-01-25",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "800,000 daily riders at launch, 27,000 passengers/hour/direction peak flow, 2011 Sustainable Transport Award.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-73c73f2afa72803b",
      "title": "C40 Cities (case study)",
      "url": "https://www.c40.org/case-studies/c40-good-practice-guides-guangzhou-brt-corridor/",
      "publisher": {
       "name": null,
       "domain": "c40.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "20%/29% speed increases for buses/mixed traffic; February 2010 opening; ITDP China collaboration.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-d0ae95517ca9c70d",
      "title": "Wikipedia (background)",
      "url": "https://en.wikipedia.org/wiki/Guangzhou_Bus_Rapid_Transit",
      "publisher": {
       "name": null,
       "domain": "en.wikipedia.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Current operational status, ~1 million daily trips, 26,900 pphpd peak flow, world's longest BRT stations.",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 1,
     "claimsMapped": 1,
     "sourcesTotal": 4,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 2,
     "sourcesWithArchive": 1,
     "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."
    ]
   }
  }
 ]
}