Permanent project revision

ZBE Rondes de Barcelona Low Emission Zone

Revision 2026-08-20-source-dates · effective 2026-07-18

Superseded. A later revision exists: 2026-08-27-p1-quality-uplift →

unreviewed

Created the first structured Evidence Passport with 1 claim and 3 source dossiers.

sha256:9d799986abe4660234f5230c8c5bac4d52e16763062cd915154f528a64c83778

All revisions → Current entity page →

Change set

add /evidencePassport — Added claim-level evidence mapping and source dossiers.
add /revisionHistory — Established a permanent, hash-addressed baseline revision.

1: of 1 claims mapped
3: source dossiers
3: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-77d75adffc25c41d quantitative

NO2 fell by up to 7.6 µg/m³ (15.8%) at traffic-monitoring stations inside the zone between 2020 and 2022

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: The study by ISGlobal, the Barcelona Public Health Agency and IDAEA-CSIC used a synthetic-control method against a modeled no-ZBE scenario.
Caveat: Effects on PM10 and PM2.5 were small and not robust across analysis methods.

Sources carrying this claim

ISGlobal — press release on peer-reviewed NO2 impact study (research)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-20-source-dates effective 2026-07-18 · created 2026-08-20

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:9d799986abe4660234f5230c8c5bac4d52e16763062cd915154f528a64c83778

Revision history → Permanent version link → Machine-readable record → Evidence Constitution →

1: of 1 claims mapped
3: source dossiers
3: publication dates recorded
0: archives linked
0: exact locators
0: content captures hashed

Governance facts carried by the record

Operator: Àrea Metropolitana de Barcelona
Actor types: regional-government
Funding model: public
Funding description: Not recorded
Cost: Not recorded
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

3 source dossiers

Àrea Metropolitana de Barcelona / Ajuntament de Barcelona — ZBE Rondes de Barcelona (authority) zbe.barcelona · background

Open original source ↗

Stable source ID: src-5e8935e594457122
Publisher: Name not classified · zbe.barcelona
Type / language: web-page · language not classified
Published: 2020-01-01
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-18
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Operator page: launch date, coverage area, municipalities, phased vehicle restrictions, operating hours.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

ISGlobal — press release on peer-reviewed NO2 impact study (research) isglobal.org · 1 linked claim

Open original source ↗

Stable source ID: src-2050256fbbaa4db7
Publisher: Name not classified · isglobal.org
Type / language: web-page · language not classified
Published: 2018-07-06
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-18
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Summarizes the Atmospheric Environment: X (2026) synthetic-control study on measured NO2/PM reductions.
Descriptive only — not page/paragraph exact
Claims linked: clm-77d75adffc25c41d

Metrópoli Abierta (El Español) — 2026 suspension and reactivation coverage (press) metropoliabierta.elespanol.com · background

Open original source ↗

Stable source ID: src-d90d4d07568cc716
Publisher: Name not classified · metropoliabierta.elespanol.com
Type / language: web-page · language not classified
Published: 2026-03-15
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-07-18
Dossier created: 2026-08-20
Retrieved copy: No local capture recorded
Archive: No archived copy linked
Content hash: No captured content hash
Locator: Open the recorded source note
Reports the March 16, 2026 reinstatement after the Rodalies-crisis suspension that began January 22, 2026.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Known limits of this passport

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.