{
 "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": "philadelphia-streetlight-led-lms",
  "title": "Philly Streetlight Improvement Project (Citywide LED + Lighting Management System)",
  "canonicalUrl": "https://1001smartcities.org/projects/philadelphia-streetlight-led-lms/"
 },
 "currentRevisionId": "2026-08-20-source-dates",
 "revisions": [
  {
   "id": "2026-08-20-source-dates",
   "createdAt": "2026-08-20T00:00:00Z",
   "effectiveAt": "2026-08-02",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 1 claim and 5 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": "sha256:8a3f42a0a3b753a77518b3546e03a88869f1c5126d8a5d945703b325f5119338",
   "snapshot": {
    "asOf": "2026-08-02",
    "projectFingerprint": "sha256:40d2f2b05ced72174f70b1c413aa21f7e74c5b5cb03a04583f1a6b6a78903b0f",
    "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": "peer-reviewed",
     "timeline": {
      "started": 2023,
      "ended": null
     }
    },
    "governance": {
     "operator": "Philadelphia Energy Authority + City of Philadelphia Streets Department (contractor: Ameresco)",
     "actorTypes": [
      "city-government"
     ],
     "fundingModel": "public",
     "fundingDescription": "Repaid from ~$5.4M/year in guaranteed energy savings via a Pennsylvania Guaranteed Energy Savings Act (GESA) performance contract, financed through Philadelphia Energy Authority",
     "cost": "~$91M citywide conversion",
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-f77a06d56ff6cdd0",
      "field": "impact",
      "text": "34,374 of ~130,000 streetlights upgraded Aug 2023-May 2024 across 13,275 blocks were linked to a 21% reduction in outdoor nighttime gun violence, a 20% reduction in violent crime, and a 16% reduction in property crime versus not-yet-upgraded blocks",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-18025a03e6cc091f"
      ],
      "supportNote": "The snippet describes the same University of Pennsylvania Criminology & Public Policy study of the first 34,374 lights across 13,275 blocks.",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-a66c8ebe152942d1",
      "title": "Philadelphia Energy Authority — Study Finds Citywide Streetlight Replacement Project Achieves 21% Reduction in Gun Violence",
      "url": "https://philaenergy.org/study-finds-citywide-streetlight-replacement-project-achieves-21-reduction-in-gun-violence/",
      "publisher": {
       "name": null,
       "domain": "philaenergy.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2025-04-24",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-02",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Study topline figures, project scope and financing",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-d74d42c405b5e240",
      "title": "Penn Crime and Justice Policy Lab — An Evaluation of Citywide Street Lighting Upgrades on Gun Violence",
      "url": "https://crimejusticelab.org/project/an-evaluation-of-citywide-street-lighting-upgrades-on-gun-violence/",
      "publisher": {
       "name": null,
       "domain": "crimejusticelab.org",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": null,
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-02",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Study design and researcher affiliation",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-18025a03e6cc091f",
      "title": "MacDonald et al. — Can enhanced street lighting improve public safety at scale?, Criminology & Public Policy",
      "url": "https://onlinelibrary.wiley.com/doi/full/10.1111/1745-9133.70006",
      "publisher": {
       "name": null,
       "domain": "onlinelibrary.wiley.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-f77a06d56ff6cdd0"
      ],
      "temporal": {
       "publishedAt": "2025-09-23",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-02",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Peer-reviewed journal publication of the crime-reduction findings, 2026",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-e4834e74935c8ea6",
      "title": "PhillyVoice — Your guide to Philadelphia's $91 million streetlight replacement project",
      "url": "https://www.phillyvoice.com/philadelphia-streetlight-led-upgrade-project-guide/",
      "publisher": {
       "name": null,
       "domain": "phillyvoice.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2025-10-28",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-02",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Project cost, LMS/networked-control description",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-cffde453c48a86c7",
      "title": "City of Philadelphia — Construction Begins on Citywide Philly Streetlight Improvement Project",
      "url": "https://www.phila.gov/2023-08-09-construction-begins-on-citywide-philly-streetlight-improvement-project/",
      "publisher": {
       "name": null,
       "domain": "phila.gov",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "background",
      "claimRefs": [],
      "temporal": {
       "publishedAt": "2023-08-08",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-02",
       "dossierCreatedAt": "2026-08-20",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Construction start date, scope of 130,000 streetlights",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 1,
     "claimsMapped": 1,
     "sourcesTotal": 5,
     "sourcesUsedByClaims": 1,
     "sourcesWithPublicationDate": 4,
     "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."
    ]
   }
  }
 ]
}
