1001 Smart Cities
🇧🇷 São Paulo

Rodízio: São Paulo's Plate-Based Peak-Hour Driving Restriction

🤖 AI-generated summary · ◆ 1 sourced claim · 🔎 Last verified

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

1 sourced claim on this page, none individually verified yet — turn on “Sources in the text” to see each one.

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One weekday a week, the last digit of your plate keeps you out of the centre. An independent four-city evaluation found no evidence that such restrictions improved air quality.

Outcome🔄 Ongoing
Evidence📊 Independent
what does this mean?The strongest source is an independent non-academic evaluation: an audit office, a government or EU review, or an NGO. It grades who did the looking — not how well the project went. All four grades →
Run byCompanhia de Engenharia de Tráfego (CET), for the Prefeitura de São Paulo
Scale🏙️ City-wide

Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 10 more in São Paulo · 🚦 Traffic management guide · 🚲 Mobility projects

A 1996 state anti-smog measure became a permanent municipal congestion rule in 1997: cars are barred from São Paulo's centro expandido one weekday a week, by the last digit of the plate, from 07:00 to 10:00 and from 17:00 to 20:00. CET traffic agents and plate-reading radars both issue the R$130.16 fine. Electric, hydrogen and hybrid cars have been exempt since 2015. Lorries fall under a separate, wider restriction.

Live 📅 since 1997

📊 Impact

An independent four-city evaluation covering São Paulo, Bogotá, Beijing and Tianjin found no evidence that plate-based restrictions improved overall air quality. It also found that restrictions limited to certain weekday hours mainly shift driving to other times, and that such schemes can still cut the extreme concentrations of pollutants. No study measuring a second-car rebound in São Paulo was found.

🎓 Lesson

The rodízio has outlived its own justification twice over: sold as anti-smog in 1996, redefended as anti-congestion in 1997, and now quietly thinned by an exemption for electrified cars that grows with every sale. A restriction is only ever as strong as its exemption list.

🚲 MobilityTraffic managementAir qualitySensors & IoT

Sources

↗ CET São Paulo — Rodízio Municipal (official rules)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.
↗ CET São Paulo — Perguntas Frequentes (rodízio section)Published 12 May 2026Carries 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.
↗ Prefeitura de São Paulo — CET aumenta a fiscalização em semáforos e instala radares com LAPPublished 25 August 2005The 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.
↗ Prefeitura de São Paulo — Prefeitura suspende Rodízio Municipal de Veículos de 22 de dezembro de 2025 a 9 de janeiro de 2026Published 22 December 2025Currency 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.
↗ Lin, Zhang and Umanskaya, 'The Effects of Driving Restrictions on Air Quality: São Paulo, Bogotá, Beijing, and Tianjin', AAEA 2011 Annual Meeting, PittsburghPublished 24 May 2011 archived copyThe 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.
Show 3 more sourcesShow fewer
↗ Câmara Municipal de São Paulo — Prefeito veta projeto de lei que acabaria com rodízio em SPPublished 2 June 2014The 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.
↗ Agência Brasil — SP tem novo rodízio de veículos a partir de hoje (11 May 2020)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.
↗ 'Heavy truck restrictions and air quality implications in São Paulo, Brazil', Journal of Environmental Management, 2017Published November 2017Cited 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.

📅 How old is the evidence?

Two clocks, kept apart: when this entry’s sources were published, and what has happened to its record in the atlas. Documented span: since 1997. 7 of 8 sources carry a publication date, from 25 August 2005 to 12 May 2026.

When the sources were published

  1. Prefeitura de São Paulo · city governmentPrefeitura de São Paulo — CET aumenta a fiscalização em semáforos e instala radares com LAP
  2. IDEAS/RePEc · researchLin, Zhang and Umanskaya, 'The Effects of Driving Restrictions on Air Quality: São Paulo, Bogotá, Beijing, and Tianjin', AAEA 2011 Annual Meeting, Pittsburgh
  3. Câmara Municipal de São Paulo · city councilCâmara Municipal de São Paulo — Prefeito veta projeto de lei que acabaria com rodízio em SP
  4. ScienceDirect (Elsevier) · research'Heavy truck restrictions and air quality implications in São Paulo, Brazil', Journal of Environmental Management, 2017
  5. Agência Brasil (Empresa Brasil de Comunicação) · pressAgência Brasil — SP tem novo rodízio de veículos a partir de hoje (11 May 2020)
  6. Prefeitura de São Paulo · city governmentPrefeitura de São Paulo — Prefeitura suspende Rodízio Municipal de Veículos de 22 de dezembro de 2025 a 9 de janeiro de 2026
  7. CET — Companhia de Engenharia de Tráfego, São Paulo · operatorCET São Paulo — Perguntas Frequentes (rodízio section)

Every source, with links ↑

What happened to this record

  1. Sources last read
  2. Entered the record

Every revision, permanent →

Show your work What this page rests on and what it can’t tell you · all 1 claims with their sources · the forensic record

Evidence Passport · public beta 1 addressable claim, 8 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 1

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-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.
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same evaluation found that restrictions limited to certain weekday hours mainly shift driving to other times.
Caveat
The evaluation also found such schemes can still cut the extreme concentrations of pollutants.

Sources carrying this claim

  1. Lin, Zhang and Umanskaya, 'The Effects of Driving Restrictions on Air Quality: São Paulo, Bogotá, Beijing, and Tianjin', AAEA 2011 Annual Meeting, Pittsburgh
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

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
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
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) cetsp.com.br · background

Open original source ↗

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
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.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
CET São Paulo — Perguntas Frequentes (rodízio section) cetsp.com.br · background

Open original source ↗

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
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.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Prefeitura de São Paulo — CET aumenta a fiscalização em semáforos e instala radares com LAP prefeitura.sp.gov.br · background

Open original source ↗

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
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.

Descriptive only — not page/paragraph exact
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 prefeitura.sp.gov.br · background

Open original source ↗

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
Archive
No archived copy linked
Content hash
No captured content hash
Locator
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.

Descriptive only — not page/paragraph exact
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 ideas.repec.org · 1 linked claim

Open original source ↗

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
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.

Descriptive only — not page/paragraph exact
Claims linked
Câmara Municipal de São Paulo — Prefeito veta projeto de lei que acabaria com rodízio em SP saopaulo.sp.leg.br · background

Open original source ↗

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
Archive
No archived copy linked
Content hash
No captured content hash
Locator
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.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Agência Brasil — SP tem novo rodízio de veículos a partir de hoje (11 May 2020) agenciabrasil.ebc.com.br · background

Open original source ↗

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
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.

Descriptive only — not page/paragraph exact
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 sciencedirect.com · background

Open original source ↗

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
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.

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.

Continue exploring

Compare this project

🇲🇽 Hoy No Circula: Mexico City's Plate-Based Driving Restriction · Mexico City The other long-running plate ban: three studies find no cleaner air in Mexico City, and a four-city null covers São Paulo too. 🇮🇩 Ganjil-Genap: Jakarta's Odd-Even Plate Rationing · Jakarta Both let cameras do the catching: Jakarta's ETLE reads plates, and São Paulo's LAP radars book rodízio breaches at R$130.16. 🇵🇭 Number Coding: Metro Manila's Plate-Based Driving Ban · Manila Manila has rationed plates since 1995 with no evaluation at all; São Paulo's 1997 rule at least sits inside a four-city study.

Explore the wider context

📟 A Reading Is Not a Decision📖 Adaptive traffic signals📖 Air quality index (AQI)📖 Automated speed enforcement (speed cameras)
📎 Cite this project

1001 Smart Cities (2026). “Rodízio: São Paulo's Plate-Based Peak-Hour Driving Restriction” — São Paulo, Brazil. The Smart City Atlas. https://1001smartcities.org/projects/sao-paulo-rodizio/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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