{ "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": "budapest-transit-app", "title": "BudapestGO Mobility Platform Integration", "canonicalUrl": "https://1001smartcities.org/projects/budapest-transit-app/" }, "currentRevisionId": "2026-08-26-claim-mapping", "revisions": [ { "id": "2026-08-20-source-dates", "createdAt": "2026-08-20T19:29:52Z", "effectiveAt": "2026-07-18", "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": "sha256:10146a0b42d1fd24663661d5ac5a4c98a6eea6e194210351f8fc7a1ec5f4789b", "snapshot": { "asOf": "2026-07-18", "projectFingerprint": "sha256:f68477729ca8f93b0fc5cdd1a0d34de0a267ca059935278ea233a8af1e7adaba", "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": 2023, "ended": null } }, "governance": { "operator": "BKK (Budapesti Közlekedési Központ)", "actorTypes": [ "utility" ], "fundingModel": null, "fundingDescription": null, "cost": null, "ownership": null, "decisionRights": null, "exitConditions": null }, "claims": [ { "id": "clm-a73633bcf5d88743", "field": "impact", "text": "\"nearly one-third of ticketed passengers on Budapest's metro network have switched to the Pay&GO contactless payment system\"", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c" ], "supportNote": "The May 2026 article carries BKK's figures for the April 2026 extension to all metro lines, including the one-third share and the 12 per cent of all single ticket sales.", "caveat": "Operator-supplied figures relayed by the press, not independently audited; the one-third share is metro-only and was measured within weeks of the full rollout.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } } ], "sources": [ { "id": "src-aa6302eef08f2cbd", "title": "BKK BudapestGO (authority)", "url": "https://bkk.hu/en/tickets-and-passes/budapestgo/", "publisher": { "name": null, "domain": "bkk.hu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "background", "claimRefs": [], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-20", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Official BKK page for the BudapestGO app (ticketing + journey planning).", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-0dea8b0a61f9fd0d", "title": "BKK Pay&Go (authority)", "url": "https://bkk.hu/en/tickets-and-passes/pay-and-go/", "publisher": { "name": null, "domain": "bkk.hu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "background", "claimRefs": [], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-20", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Official BKK page for the Pay&Go tap-to-ride system; lists 100E and metro M1-M4.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-43432c65579b289c", "title": "Hungarian Conservative (press)", "url": "https://www.hungarianconservative.com/articles/current/budapest-contactless-metro-ticketing-paygo/", "publisher": { "name": null, "domain": "hungarianconservative.com", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-a73633bcf5d88743" ], "temporal": { "publishedAt": "2026-05-20", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-20", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "May 2026: 5M+ Pay&Go tickets (Jun 2023-May 2026), 2.1M+ users, full M1-M4 rollout on 22 Apr 2026.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-0d04c478d52fe200", "title": "EU Tourism Transition Pathways (independent)", "url": "https://transition-pathways.europa.eu/tourism/best-practices/budapestgo-smart-mobility-app-public-transport", "publisher": { "name": null, "domain": "transition-pathways.europa.eu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "background", "claimRefs": [], "temporal": { "publishedAt": "2025-06-13", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-20", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "EU best-practice profile: ~1.4M monthly active users, 4-4.5M routes/month.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } } ], "coverage": { "claimsTotal": 1, "claimsMapped": 1, "sourcesTotal": 4, "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." ] } }, { "id": "2026-08-26-claim-mapping", "createdAt": "2026-08-26T22:30:00Z", "effectiveAt": "2026-07-18", "changeType": "update", "summary": "Added a seven-claim evidence mapping and a sourced lesson; corrected the attribution of the adoption figures, which are Mastercard's and not the transport authority's, and recorded that the EU best-practice page naming the monthly user figures lists the transport authority itself as the submitting organisation. Evidence grade moved from independent to media.", "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": "replace", "path": "/snapshot/projectFingerprint", "summary": "Updated projectFingerprint to the current sourced project record." }, { "operation": "replace", "path": "/snapshot/projectState", "summary": "Updated projectState to the current sourced project record." }, { "operation": "replace", "path": "/snapshot/claims", "summary": "Updated claims to the current sourced project record." }, { "operation": "replace", "path": "/snapshot/sources", "summary": "Updated sources to the current sourced project record." } ], "snapshotHash": "sha256:71db302feca8df5fc06e8e40ff0fa3f2b46267453c3a5f4544ac0f9caf510665", "snapshot": { "asOf": "2026-07-18", "projectFingerprint": "sha256:d36d7eb89072e9a69ce85f20f98251510ff7b59960cc26dcc7a16d5c4327fac7", "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": "media", "timeline": { "started": 2023, "ended": null } }, "governance": { "operator": "BKK (Budapesti Közlekedési Központ)", "actorTypes": [ "utility" ], "fundingModel": null, "fundingDescription": null, "cost": null, "ownership": null, "decisionRights": null, "exitConditions": null }, "claims": [ { "id": "clm-a8e5793d50384f54", "field": "snippet", "text": "BudapestGO, the renamed FUTAR app, averages roughly 1.4 million monthly users and 4 to 4.5 million trips planned per month", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-0d04c478d52fe200", "src-aa6302eef08f2cbd" ], "supportNote": "The best-practice profile, submitted by the transport authority, gives both figures; the authority's own page describes the app's ticketing and journey planning.", "caveat": "Both figures originate with the transport authority; the EU platform hosts the profile rather than assessing it.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-2f9f92c759c80fd2", "field": "snippet", "text": "Its Pay&Go tap-to-ride ticketing, piloted in 2023 on the 100E Airport Express and metro line M1 and extended to all metro lines M1 to M4 in April 2026, has sold over 5 million tickets to more than 2.1 million users", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c", "src-0dea8b0a61f9fd0d" ], "supportNote": "The May 2026 report gives the ticket and user totals for 20 June 2023 to 13 May 2026 and the network-wide metro rollout of 22 April 2026; the authority's page lists the 100E and lines M1 to M4.", "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-611f61a79952ddb8", "field": "impact", "text": "Mastercard, the card scheme behind the tap-to-ride system, reported in May 2026 that nearly one-third of ticketed passengers on the metro network had switched to Pay&GO since the April rollout", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c" ], "supportNote": "The report attributes the near one-third share explicitly to Mastercard and dates it to the period since the April rollout.", "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-9bce626e69b25d52", "field": "impact", "text": "across that period Pay&GO accounted for 12 per cent of all single ticket sales in Budapest", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c" ], "supportNote": "The report states the 12 per cent share of all single ticket sales over the examined period.", "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-651050b0dd5eb648", "field": "impact", "text": "Its own survey put trial at 26 per cent of ticket buyers and awareness at 46 per cent", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c" ], "supportNote": "The report gives both survey figures and attributes the research to Mastercard.", "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-61d9a8490c6cecbd", "field": "lesson", "text": "the monthly user and trip figures come from the transport authority, published on an EU best-practice platform that names the authority itself as the submitting organisation", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-0d04c478d52fe200" ], "supportNote": "The best-practice page names the Centre for Budapest Transport as the publishing organisation.", "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-ff3736d98c8289a0", "field": "lesson", "text": "tapping a bank card at a metro gate began as a pilot on one line and an airport bus in 2023 and only reached all four metro lines in April 2026", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-43432c65579b289c", "src-0dea8b0a61f9fd0d" ], "supportNote": "The May 2026 report dates the start to June 2023 and the network-wide metro rollout to 22 April 2026.", "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-aa6302eef08f2cbd", "title": "BKK BudapestGO (authority)", "url": "https://bkk.hu/en/tickets-and-passes/budapestgo/", "publisher": { "name": null, "domain": "bkk.hu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-a8e5793d50384f54" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-26", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Official BKK page for the BudapestGO app (ticketing + journey planning).", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-0dea8b0a61f9fd0d", "title": "BKK Pay&Go (authority)", "url": "https://bkk.hu/en/tickets-and-passes/pay-and-go/", "publisher": { "name": null, "domain": "bkk.hu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-2f9f92c759c80fd2", "clm-ff3736d98c8289a0" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-26", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Official BKK page for the Pay&Go tap-to-ride system; lists 100E and metro M1-M4.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-43432c65579b289c", "title": "Hungarian Conservative (press)", "url": "https://www.hungarianconservative.com/articles/current/budapest-contactless-metro-ticketing-paygo/", "publisher": { "name": null, "domain": "hungarianconservative.com", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-2f9f92c759c80fd2", "clm-611f61a79952ddb8", "clm-9bce626e69b25d52", "clm-651050b0dd5eb648", "clm-ff3736d98c8289a0" ], "temporal": { "publishedAt": "2026-05-20", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-26", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "May 2026: Mastercard reports nearly one-third of ticketed metro passengers switched to Pay&GO since the April rollout; more than five million tickets sold between 20 June 2023 and 13 May 2026 to over 2.1 million users; 93,000 single tickets in under a month after the network-wide extension; 12 per cent of all single ticket sales over the period; and a Mastercard survey putting trial at 26 per cent and awareness at 46 per cent.", "exact": false }, "preservation": { "archiveUrl": "https://web.archive.org/web/20260812180146/https://www.hungarianconservative.com/articles/current/budapest-contactless-metro-ticketing-paygo/", "archivedAt": "2026-08-12", "contentHash": null, "status": "archive-linked" } }, { "id": "src-0d04c478d52fe200", "title": "EU Tourism Transition Pathways (independent)", "url": "https://transition-pathways.europa.eu/tourism/best-practices/budapestgo-smart-mobility-app-public-transport", "publisher": { "name": null, "domain": "transition-pathways.europa.eu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-a8e5793d50384f54", "clm-61d9a8490c6cecbd" ], "temporal": { "publishedAt": "2025-06-13", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-07-18", "dossierCreatedAt": "2026-08-26", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "EU tourism platform best-practice profile giving about 1.4 million monthly active users and 4 to 4.5 million routes planned per month. The page names the Centre for Budapest Transport as the publishing organisation, so the figures are the operator's own, hosted by an EU platform rather than assessed by it.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } } ], "coverage": { "claimsTotal": 7, "claimsMapped": 7, "sourcesTotal": 4, "sourcesUsedByClaims": 4, "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." ] } } ] }