clm-a106554b3886401f
descriptive
An independent four-city evaluation covering São Paulo, Bogotá, Beijing and Tianjin found no evidence that plate-based restrictions improved overall air quality.
Permanent project revision
Rodízio: São Paulo's Plate-Based Peak-Hour Driving Restriction
Revision 2026-08-20-source-dates · effective 2026-07-26
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.
sha256:4f9733c499fb77b3d007dfa12ebf0ea6c018757b32dc61da595454df0e2d69dd
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
- 6
- publication dates recorded
- 1
- archives linked
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- 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.
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 2026-07-26 · created 2026-08-20
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:4f9733c499fb77b3d007dfa12ebf0ea6c018757b32dc61da595454df0e2d69dd
- 1
- of 1 claims mapped
- 8
- source dossiers
- 6
- publication dates recorded
- 1
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Companhia de Engenharia de Tráfego (CET), for the Prefeitura de São Paulo
- Actor types
- city-government
- Funding model
- public
- Funding description
- Not recorded
- Cost
- Not recorded
- Ownership
- Not recorded
- Decision rights
- Not recorded
- Exit conditions
- Not recorded
8 source dossiers
CET São Paulo — Rodízio Municipal (official rules)
- Stable source ID
src-a6bd6b88a534d86c- Publisher
- Name not classified · cetsp.com.br
- Type / language
- web-page · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
The operator's own rules page. Hours: 'das 7h às 10h' and 'das 17h às 20h' ('from 7am to 10am' and 'from 5pm to 8pm'). Plate table: Monday 1 and 2, Tuesday 3 and 4, Wednesday 5 and 6, Thursday 7 and 8, Friday 9 and 0. Zone described as the mini-anel viário. Also the source for keeping lorries apart: inside the red area 'Nas vias da área vermelha não circulam automóveis nem caminhões' ('on roads in the red area neither cars nor lorries circulate'), while on the boundary ring roads 'Caminhões estão liberados do Rodízio' ('lorries are exempt from the Rodízio') and only cars are restricted. Legal basis listed as Lei 12.490/97, Lei 14.751/08, Lei 16.813/18, Decreto 58.584/18, Decreto 58.604/19.
- Claims linked
- Background source; no baseline claim points here
CET São Paulo — Perguntas Frequentes (rodízio section)
- Stable source ID
src-666579bffb6485e1- Publisher
- Name not classified · cetsp.com.br
- Type / language
- web-page · language not classified
- Published
- 2026-05-12
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Carries three load-bearing facts. Enforcement: CET enforces through traffic agents on the street and through electronic enforcement equipment regulated by CONTRAN. Exemption, quoting Decreto 58.584/18 Art. 3: 'Os movidos por energia de propulsão elétrica, a hidrogênio ou híbridos' ('those powered by electric propulsion, hydrogen or hybrid'); CNG vehicles are explicitly not exempt. Penalty: R$130.16 and four licence points, classified as an infração média, not grave as several Brazilian aggregator sites state. Legal basis given as Lei 12.490 of 3 October 1997.
- Claims linked
- Background source; no baseline claim points here
Prefeitura de São Paulo — CET aumenta a fiscalização em semáforos e instala radares com LAP
- Stable source ID
src-36713c494448d044- Publisher
- Name not classified · prefeitura.sp.gov.br
- Type / language
- web-page · language not classified
- Published
- 2005-08-25
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
The decisive sentence for this atlas, verbatim: 'radares com LAP (leitura automática de placas), que captam a imagem dos veículos e registram infrações ao rodízio e excesso de velocidade' ('radars with LAP, automatic plate reading, which capture the image of vehicles and record rodízio infractions and speeding'). Establishes that a machine reading, not only an officer's eye, puts drivers into the penalty loop. The city page records the first ten devices going live on 23 August and a build-out to 25 devices rotating across 60 points; the year did not render cleanly in this desk's fetch and is therefore not asserted in the entry.
- Claims linked
- Background source; no baseline claim points here
Prefeitura de São Paulo — Prefeitura suspende Rodízio Municipal de Veículos de 22 de dezembro de 2025 a 9 de janeiro de 2026
- Stable source ID
src-f43428fdec279da1- Publisher
- Name not classified · prefeitura.sp.gov.br
- Type / language
- web-page · language not classified
- Published
- 2025-12-22
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
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- No archived copy linked
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- No captured content hash
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Open the recorded source note
Currency check. The city suspended the rodízio for the 2025/26 holiday period and restored it on 12 January 2026, which is what fixes the status of this entry at live rather than suspended.
- Claims linked
- Background source; no baseline claim points here
Lin, Zhang and Umanskaya, 'The Effects of Driving Restrictions on Air Quality: São Paulo, Bogotá, Beijing, and Tianjin', AAEA 2011 Annual Meeting, Pittsburgh
- Stable source ID
src-7f00360f73877142- Publisher
- Name not classified · ideas.repec.org
- Type / language
- web-page · language not classified
- Published
- 2011-05-24
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- Open archived copy ↗ · 2024-07-26
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
The sentences carrying the impact field, verbatim from the abstract: 'We investigate whether driving restrictions introduced in São Paulo, Bogotá, Beijing and Tianjin have improved air quality. Across different versions of the driving restrictions there is no evidence that the overall air quality at different places has been improved.' And the two findings that distinguish it from the Mexico City literature: 'Temporal shifting of driving is likely to appear when the restrictions are only effective during certain hours of weekdays. Driving restrictions could potentially reduce the extreme concentrations of air pollutants.' The successor article, Zhang, Lin Lawell and Umanskaya, Journal of Environmental Economics and Management 82, 2017, pp. 181-220, develops the theory but draws its empirics from Bogotá, so the São Paulo result is graded independent rather than peer-reviewed.
- Claims linked
Câmara Municipal de São Paulo — Prefeito veta projeto de lei que acabaria com rodízio em SP
- Stable source ID
src-4c02f7a5332b5c46- Publisher
- Name not classified · saopaulo.sp.leg.br
- Type / language
- web-page · language not classified
- Published
- 2014-06-02
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
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- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
The political record from the council's own portal: councillors approved PL 15/2006 by vereador Adilson Amadeu to abolish the rodízio in 2014, and Mayor Fernando Haddad vetoed it, arguing the measure directly affects a large share of the city's population and would need wide public debate first. Cited for the political history only, never for an effect figure. No 2026 abolition bill was found.
- Claims linked
- Background source; no baseline claim points here
Agência Brasil — SP tem novo rodízio de veículos a partir de hoje (11 May 2020)
- Stable source ID
src-d204642019946f26- Publisher
- Name not classified · agenciabrasil.ebc.com.br
- Type / language
- web-page · language not classified
- Published
- 2020-05-11
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
The pandemic interruption. The ordinary rodízio was suspended in March 2020; on 11 May 2020 it was replaced by an emergency citywide 24-hour odd-even rule, plates ending 0-2-4-6-8 on even dates and 1-3-5-7-9 on odd dates. Trade reporting (Diário do Transporte, 10 and 17 May 2020) records Mayor Bruno Covas ending that emergency rule on 17 May 2020, with the ordinary peak-hour rodízio returning on 18 May 2020; that restoration date rests on trade press and was not confirmed against a primary act.
- Claims linked
- Background source; no baseline claim points here
'Heavy truck restrictions and air quality implications in São Paulo, Brazil', Journal of Environmental Management, 2017
- Stable source ID
src-5f1d45098cf13fc9- 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
- 2026-07-26
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Cited only to keep two programmes apart. This paper evaluates São Paulo's heavy-vehicle restriction, a separate and wider regime, not the plate-based rodízio. Its reported result, for one major corridor between 2008 and 2012, is a fall in PM10 and NOx of 28 and 43 per cent attributed to the lorry restriction, partly offset by a rebound of light-vehicle traffic. Publisher page paywalled and blocked from this desk; abstract read at search level. No figure in this entry rests on it.
- 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.