{
 "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": "london-fusion-adaptive-signals",
  "title": "London Adaptive Traffic Signals (FUSION / Real Time Optimiser)",
  "canonicalUrl": "https://1001smartcities.org/projects/london-fusion-adaptive-signals/"
 },
 "currentRevisionId": "2026-08-22-evidence-baseline",
 "revisions": [
  {
   "id": "2026-08-22-evidence-baseline",
   "createdAt": "2026-08-22T18:13:00Z",
   "effectiveAt": "2026-08-06",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 8 claims 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": "sha256:8aee675f5d3dcc292cdc846e8eefda4c7b4bd06f432e5cbfae435ed07867cc42",
   "snapshot": {
    "asOf": "2026-08-06",
    "projectFingerprint": "sha256:e5e5dbbcfbf7a43d8995a0ec78530545552debe0d6ce7288d9846cbd7e8c6605",
    "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": "official",
     "timeline": {
      "started": 2020,
      "ended": null
     }
    },
    "governance": {
     "operator": "Transport for London (Yunex Traffic vendor)",
     "actorTypes": [
      "utility",
      "private"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-5ba8a2c0087040d7",
      "field": "snippet",
      "text": "Since 2020 TfL and Yunex Traffic (formerly Siemens Mobility, with the University of Southampton) have been developing FUSION",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-4e0c171abfb7e6de"
      ],
      "supportNote": "Traffic Technology Today (24 September 2020) reports the launch: \"Siemens Mobility Limited and Transport for London (TfL) have announced the launch of Sitraffic Fusion\", and that it was \"Developed by Siemens Mobility in collaboration with TfL and supported by the University of Southampton.\" The vendor is quoted there as \"Wilke Reints, MD, Siemens Mobility ITS, UK\" -- the same person is quoted in the entry's 2024 sources as \"Wilke Reints, Yunex Traffic Managing Director\", which is the corroboration for \"(formerly Siemens Mobility)\", though this session could not load the 2024 releases directly (see the claim below on the RTO migration).",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-22cd9e7c237b6f96",
      "field": "snippet",
      "text": "an adaptive signal-control system meant to replace the 30-year-old SCOOT",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-8b9d709534927e8c",
       "src-7049d0840610bd57"
      ],
      "supportNote": "Neither wired-gov.net nor yunextraffic.com could be loaded directly in this session (see caveat), but the joint TfL/Yunex release they carry is mirrored verbatim elsewhere: TfL's own newsroom platform (tfl-newsroom.prgloo.com, 7 June 2024) states SCOOT \"has been operating across London for more than 30 years\", and describes the system it replaces as having been \"keeping London moving for more than 30 years\"; a second, independent trade-press mirror of the Yunex release (highways.today, 8 June 2024) says FUSION \"will replace the SCOOT system that has been operating across London for more than 30 years.\" \"Adaptive signal-control system\" matches how FUSION is described from its 2020 launch onward (Traffic Technology Today: \"an all-new adaptive traffic control solution\").",
      "caveat": "Neither of the two listed URLs for this figure could be loaded in this verification session (wired-gov.net returned HTTP 503 / connection reset on repeated attempts; yunextraffic.com redirected to a bot-check page). The wording is corroborated only via independent mirrors of the same press release, not via the exact cited pages.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-66e0e68587362ce7",
      "field": "snippet",
      "text": "by drawing on richer multi-modal data, including connected-vehicle and bus feeds",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-4e0c171abfb7e6de"
      ],
      "supportNote": "Traffic Technology Today (24 September 2020): \"The new Fusion system uses richer data sources from a variety of transport modes, including data from connected vehicles and buses,\" and earlier in the same piece: FUSION uses \"connected vehicle data to identify pedestrians, cyclists and public transport vehicles, as well as cars.\"",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-630c80e1eb2faeaa",
      "field": "snippet",
      "text": "In June 2024 TfL completed migrating almost 4,000 junctions and 1,500 pedestrian crossings onto the cloud-based Real Time Optimiser platform that will host it",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-8b9d709534927e8c",
       "src-7049d0840610bd57"
      ],
      "supportNote": "Both listed URLs were unreachable directly in this session (see caveat), but the joint TfL/Yunex release they carry is mirrored on TfL's own newsroom (tfl-newsroom.prgloo.com, 7 June 2024), which confirms a June 2024 completion of the migration onto the cloud-based Real Time Optimiser (RTO) platform and that RTO \"provides TfL with the platform to support the introduction of FUSION.\" The completion date and platform name are well supported; the '~6,400 / all' figure for what was migrated is not (see caveat).",
      "caveat": "TfL and Yunex's own figures for the June 2024 migration are lower than 'all ~6,400': the mirrored release states \"Almost 4,000 junctions, 1,500 pedestrian crossings, and more than 16,000 traffic detectors ... were seamlessly migrated\" (roughly 5,500 junctions and crossings combined), and an independent trade-press mirror (highways.today, 8 June 2024) likewise gives \"approximately 5,500 junctions and pedestrian crossing sites\", \"over 15,000 SCOOT® links\" and \"over 16,000 SCOOT® Detectors.\" The same TfL release separately says TfL manages \"around 6,400 automated traffic signal junctions and pedestrian crossings\" across London in total -- that is the figure for TfL's whole signal estate, not a stated count of what moved onto RTO in June 2024. Neither of the two cited URLs (wired-gov.net, yunextraffic.com) could be loaded directly in this session to confirm their exact wording first-hand.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-fbd7c0132591e879",
      "field": "snippet",
      "text": "FUSION itself is still running at a handful of 'living laboratory' trial junctions",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-4e0c171abfb7e6de"
      ],
      "supportNote": "Traffic Technology Today (24 September 2020) quotes Siemens Mobility's UK ITS Managing Director describing FUSION's initial deployment: it \"will control a number of ‘living laboratory’ trial sites in London,\" used to \"test increasingly complex functionality and verify its enhanced performance at existing traffic intersections in a live environment.\"",
      "caveat": "The 2020 launch announcement says FUSION would run at 'a number of' trial sites, not a specific count, and none of the entry's four sources give a current (2026) figure for how many junctions FUSION runs at; 'a handful' is an editorial estimate rather than a cited number, and 'living laboratory' is a quote from the original 2020 launch rather than from a source describing FUSION's present-day footprint.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-01764ff84cf8e792",
      "field": "snippet",
      "text": "while SCOOT keeps controlling most of the capital",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-4e0c171abfb7e6de"
      ],
      "supportNote": "The same 2020 article: \"While SCOOT will continue to operate for the time being across most of the capital, Fusion will soon be tested, live, in specific areas.\"",
      "caveat": "This description dates to September 2020, at FUSION's launch. None of the entry's other sources restate that SCOOT still controls 'most of the capital' as of the entry's 2026-08-06 lastVerified date; the 2026 TfL strategy source treats a wider FUSION rollout as still to come, which is consistent with, but does not independently confirm, SCOOT still being dominant today.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-fa48d0d66267f607",
      "field": "snippet",
      "text": "TfL's 2026 'London on the move' strategy projects up to 14% less delay and ~£1bn in benefits once FUSION progressively replaces SCOOT",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-620ccd907f4f74aa"
      ],
      "supportNote": "TfL's 'London on the move' release (26 January 2026) ties these figures directly to FUSION rather than the five-year plan generally: \"Improvements to London's world-leading FUSION traffic control system ... The changes could reduce delays by up to 14 per cent and deliver £1 billion in benefits through reduced journey times.\"",
      "caveat": "The source does not use the phrase 'once FUSION progressively replaces SCOOT'; it frames the 14%/£1bn figures as flowing from 'improvements' to FUSION (updating it to analyse a broader range of data), without spelling out a specific SCOOT-replacement timeline or milestone tied to those numbers.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-4c0e0c533d56c756",
      "field": "snippet",
      "text": "AI-based enhancements are framed as a future upgrade, not a current capability",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-620ccd907f4f74aa"
      ],
      "supportNote": "TfL's release states FUSION \"can be upgraded in future to take advantage of artificial intelligence sensors,\" explicitly placing AI in a future phase rather than describing it as already in use.",
      "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-8b9d709534927e8c",
      "title": "TfL / Yunex Traffic press release, 'TfL and Yunex successfully complete world-leading upgrade to London's traffic signal system', 10 June 2024",
      "url": "https://www.wired-gov.net/wg/news.nsf/articles/tfl+and+yunex+successfully+complete+world+leading+upgrade+to+londons+traffic+signal+system+10062024121500?open=",
      "publisher": {
       "name": null,
       "domain": "wired-gov.net",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-22cd9e7c237b6f96",
       "clm-630c80e1eb2faeaa"
      ],
      "temporal": {
       "publishedAt": "2024-06-10",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Confirms June 2024 completion of the cloud RTO migration: ~6,400 signal sites, ~4,000 junctions, 1,500 crossings, 16,000+ detectors; FUSION to replace SCOOT",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-7049d0840610bd57",
      "title": "Yunex Traffic newsroom, 'Urban Traffic Control solution live across London', 7 June 2024",
      "url": "https://www.yunextraffic.com/newsroom/urban-traffic-control-solution-live-across-london/",
      "publisher": {
       "name": null,
       "domain": "yunextraffic.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-22cd9e7c237b6f96",
       "clm-630c80e1eb2faeaa"
      ],
      "temporal": {
       "publishedAt": "2024-06-07",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Confirms UTC-UX/RTO hosted platform live citywide (~5,500 junctions+crossings); FUSION deployment 'over the coming years' — i.e. platform complete, FUSION rollout ongoing",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-4e0c171abfb7e6de",
      "title": "Traffic Technology Today, 'Siemens Mobility and TfL announce launch of the new SCOOT' (Sitraffic FUSION, developed with University of Southampton)",
      "url": "https://www.traffictechnologytoday.com/news/traffic-management/siemens-mobility-and-transport-for-london-announce-new-adaptive-traffic-control-solution-the-new-scoot.html",
      "publisher": {
       "name": null,
       "domain": "traffictechnologytoday.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-5ba8a2c0087040d7",
       "clm-66e0e68587362ce7",
       "clm-fbd7c0132591e879",
       "clm-01764ff84cf8e792"
      ],
      "temporal": {
       "publishedAt": "2020-09-24",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Confirms vendor (Siemens Mobility, now Yunex) + University of Southampton, FUSION entered operation Autumn 2020 at trial sites, uses connected-vehicle and bus data",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     },
     {
      "id": "src-620ccd907f4f74aa",
      "title": "TfL newsroom, 'TfL unveils ambitious five-year plan... London on the move', 26 Jan 2026",
      "url": "https://tfl-newsroom.prgloo.com/news/tfl-unveils-ambitious-five-year-plan-to-cut-congestion-and-transform-londons-road-network-for-the-future",
      "publisher": {
       "name": null,
       "domain": "tfl-newsroom.prgloo.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-fa48d0d66267f607",
       "clm-4c0e0c533d56c756"
      ],
      "temporal": {
       "publishedAt": "2026-01-26",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-08-06",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Source of the 'up to 14% less delay' and ~£1bn benefit projection; states FUSION 'can be upgraded in future to take advantage of artificial intelligence' — AI is a future phase; 3,500 figure = signals on bus routes, not total",
       "exact": false
      },
      "preservation": {
       "archiveUrl": null,
       "archivedAt": null,
       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 8,
     "claimsMapped": 8,
     "sourcesTotal": 4,
     "sourcesUsedByClaims": 4,
     "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."
    ]
   }
  }
 ]
}