Permanent project revision

Real-Time Air Quality Monitoring and Oslo's Once-Fired Diesel Ban

Revision 2026-08-20-source-dates · effective 2026-08-04

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 1 claim and 8 source dossiers.

sha256:317074dad4000188540335a2d60268675b95bef540f07abcac7bf4ad9cf13d47

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
8: source dossiers
2: 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-bf0e9c0db79c7390 quantitative

A peer-reviewed evaluation of the 2004-2015 speed-limit cuts found no measurable drop in roadside pollution despite slower traffic.

Published field: impact · verbatim
Mapping: mapped · no interpretation or interpolation added by this passport
What the mapping says: This is the peer-reviewed study's own null finding on Oslo's winter speed-limit reductions.
Caveat: The null result concerns the fixed-calendar speed limit only, not the studded-tyre fee or the diesel-ban trigger described elsewhere in the entry.

Sources carrying this claim

Folgerø, Harding & Westby — "Going fast or going green? Evidence from environmental speed limits in Norway", Transportation Research Part D (2020)

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 2026-08-04 · created 2026-08-20

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

sha256:317074dad4000188540335a2d60268675b95bef540f07abcac7bf4ad9cf13d47

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

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

Governance facts carried by the record

Operator: Bymiljøetaten (City of Oslo) and Statens vegvesen operate the monitoring stations; NILU runs the public data platform.
Actor types: city-government, national-government, research
Funding model: public
Funding description: Not recorded
Cost: Not recorded
Ownership: Not recorded
Decision rights: Not recorded
Exit conditions: Not recorded

8 source dossiers

City of Oslo — Temporary Ban on Diesel Vehicles (official, English) oslo.kommune.no · background

Open original source ↗

Stable source ID: src-60e658bb2547d424
Publisher: Name not classified · oslo.kommune.no
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
Trigger conditions (high pollution, large area, 2+ days), the 24-hour notice requirement, and confirmation that no ban is currently in force.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

City of Oslo — Effekt og historikk om dieselforbud (official) oslo.kommune.no · background

Open original source ↗

Stable source ID: src-e0c1cc04174292e0
Publisher: Name not classified · oslo.kommune.no
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
States the ban has been imposed only once, on 17 January 2017, despite roughly seven qualifying high-pollution episodes over the preceding 15 years.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Lovdata — Forskrift om midlertidig trafikkregulerende tiltak ved høy luftforurensning, Oslo kommune lovdata.no · background

Open original source ↗

Stable source ID: src-7e36826c9889712b
Publisher: Name not classified · lovdata.no
Type / language: web-page · language not classified
Published: 2016-12-01
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
The regulation itself, adopted by Oslo bystyre on 1 December 2016 under the Road Traffic Act §7; the legal basis for the diesel-ban trigger.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

City of Oslo — Air quality statistics (official, English) oslo.kommune.no · background

Open original source ↗

Stable source ID: src-a93d8084a995cfde
Publisher: Name not classified · oslo.kommune.no
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
NO2 has not exceeded the limit value in Oslo since 2017; also lists the vehicle-side measures (studded-tyre fee, environmental speed limit, road-dust prevention).
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

City of Oslo — Luftkvalitet i Oslo (official) oslo.kommune.no · background

Open original source ↗

Stable source ID: src-6eb6d17995e08142
Publisher: Name not classified · oslo.kommune.no
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
The measurement programme: 13 stations, 8 owned by the city's Bymiljøetaten and 5 by Statens vegvesen, measuring PM10, PM2.5, NO2 and ozone.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

Folgerø, Harding & Westby — "Going fast or going green? Evidence from environmental speed limits in Norway", Transportation Research Part D (2020) sciencedirect.com · 1 linked claim

Open original source ↗

Stable source ID: src-d0c3924cb71682bf
Publisher: Name not classified · sciencedirect.com
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
Peer-reviewed evaluation of Oslo's 2004-2015 winter speed-limit reductions: slower travel speeds, but no measurable drop in roadside air pollution.
Descriptive only — not page/paragraph exact
Claims linked: clm-bf0e9c0db79c7390

Miljødirektoratet / NTB — "Fleire kommunar braut grenseverdiane for svevestøv i 2025" kommunikasjon.ntb.no · background

Open original source ↗

Stable source ID: src-df2bf78e9ec395ef
Publisher: Name not classified · kommunikasjon.ntb.no
Type / language: web-page · language not classified
Published: 2026-04-16
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
Norway's environment agency confirms Oslo breached the national annual limit values for PM10 and PM2.5 in 2025.
Descriptive only — not page/paragraph exact
Claims linked: Background source; no baseline claim points here

City of Oslo — Studded Tyre Fee (official, English) oslo.kommune.no · background

Open original source ↗

Stable source ID: src-222a910238cd61b4
Publisher: Name not classified · oslo.kommune.no
Type / language: web-page · language not classified
Published: Not recorded
Updated: Not recorded
Source last checked: No source-level check date
Record last verified: 2026-08-04
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
The fee runs on a fixed 1 November-4 April calendar regardless of the day's measured pollution — cited here to show it is NOT a real-time trigger.
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.