Superblock Sant Antoni
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.
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✎ Corrected 27 Aug 2026 Evidence grade changed: independent → media. · 2 revisions in all What changed →
Superblock around the renovated Sant Antoni market, opened 2018 after a participatory process with local people in 2017: through-traffic is diverted to the perimeter, crossings redesigned and squares greened, and the city reports street-calming here having cut traffic by an average of 17%. Since 2023 the Collboni administration has kept it while reworking the temporary tactical layout into a permanent redesign.
what does this mean?
The strongest source is press reporting; no primary evaluation was located. It grades who did the looking — not how well the project went. All four grades →📊 Impact
Barcelona's public health agency measured a 25% drop in NO2 and a 17% drop in PM10 inside the Sant Antoni superblock — the strongest result of the three it assessed over three years, since Horta showed no significant change and no data could be collected for Poblenou. The same report carries the caveat: residents perceived pollution rising on the surrounding streets, and the agency's own technician said a count of cars or pollution outside the superblocks was not available. Families in Sant Antoni said the superblock let them move around more freely but created a false sense of security, because the main corridors still carried too much traffic.
🎓 Lesson
The measurement stops at the perimeter. Sant Antoni is the superblock that worked — a quarter less nitrogen dioxide on the health agency's own numbers — and the same agency reported that nobody counted the cars or the air on the streets the traffic was pushed onto. Of the three superblocks assessed, one showed no significant change and one could not be measured at all. A scheme whose mechanism is displacement has to measure where it displaces to, or its best result stays an open question.
Sources
Show your work What this page rests on and what it can’t tell you · all 9 claims with their sources · the forensic record
Evidence Passport · public beta 9 addressable claims, 3 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 9
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.
clm-fdc8ba976f83ef86
quantitative
opened 2018 after a participatory process with local people in 2017
Sources carrying this claim
clm-ba0fe36113dacfd7
quantitative
the city reports street-calming here having cut traffic by an average of 17%
Sources carrying this claim
clm-86b19c3b0600c655
quantitative
Since 2023 the Collboni administration has kept it while reworking the temporary tactical layout into a permanent redesign
Sources carrying this claim
clm-9135f1119be96e10
quantitative
Barcelona's public health agency measured a 25% drop in NO2 and a 17% drop in PM10 inside the Sant Antoni superblock
Sources carrying this claim
clm-d256a1b873abb6dc
descriptive
the strongest result of the three it assessed over three years, since Horta showed no significant change and no data could be collected for Poblenou
Sources carrying this claim
clm-4e758649d0afc00d
descriptive
residents perceived pollution rising on the surrounding streets, and the agency's own technician said a count of cars or pollution outside the superblocks was not available
Sources carrying this claim
clm-7104288688a33e35
descriptive
Families in Sant Antoni said the superblock let them move around more freely but created a false sense of security, because the main corridors still carried too much traffic
Sources carrying this claim
clm-d0db4adb45857652
descriptive
a quarter less nitrogen dioxide on the health agency's own numbers — and the same agency reported that nobody counted the cars or the air on the streets the traffic was pushed onto
Sources carrying this claim
clm-9951e68ce83b09c9
descriptive
Of the three superblocks assessed, one showed no significant change and one could not be measured at all
Sources carrying this claim
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.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:cb4f9ccff523d6e00bf2c9c5f5fd6823bf46883ebc6e53190b84aa02fc04d9d5
- 9
- of 9 claims mapped
- 3
- source dossiers
- 2
- publication dates recorded
- 1
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Ajuntament de Barcelona
- 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
3 source dossiers
Ajuntament de Barcelona (authority)
- Stable source ID
src-ac9b2e90f3480d45- Publisher
- Name not classified · ajuntament.barcelona.cat
- Type / language
- web-page · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-16
- Dossier created
- 2026-08-27
- 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
Official superblocks programme page; carries no publication date.
- Claims linked
- Background source; no baseline claim points here
Barcelona City Council — Info Barcelona (authority)
- Stable source ID
src-62dfc6664480cf35- Publisher
- Name not classified · barcelona.cat
- Type / language
- web-page · language not classified
- Published
- 2023-02-15
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-16
- Dossier created
- 2026-08-27
- 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
City news page, 15 February 2023: the participatory process with local people in 2017, an average 17% reduction in traffic from street-calming measures, and the works updating benches, seats, traffic lights, streetlights, water springs and garden tubs.
Cities Today (trade)
- Stable source ID
src-d2de93fc6662cbfc- Publisher
- Name not classified · cities-today.com
- Type / language
- web-page · language not classified
- Published
- 2021-10-18
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-07-16
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- Open archived copy ↗ · 2026-04-21
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
18 October 2021: a report by Barcelona's Public Health Agency (ASPB), 'Salut als Carrers', assessing three of the four superblocks over three years — a 25% drop in NO2 and a 17% decrease in PM10 in Sant Antoni, no significant change in Horta, no data for Poblenou, residents perceiving pollution rising on surrounding streets, and the agency's co-author stating a count of cars or pollution outside the superblocks was not available.
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
The superblock, four times, and what happened after the ribbon
One idea — push through-traffic to the perimeter and give the inside back to people — built four times over a decade. Read in order, the set is less about design than about what survives a change of administration and a court.
| Project | Since | Status | Outcome | Evidence | Run by | Cost | Where it stands |
|---|---|---|---|---|---|---|---|
| Superblock PoblenouBarcelona, 🇪🇸 | 2016 | Live | Succeeded | Official | City government | not public | The pilot that set the method: cheap tactical materials first, concrete later. Traffic on the inner streets fell by well over half, and the perimeter barely moved. |
| Superblock Sant AntoniBarcelona, 🇪🇸 | 2018 | Live | Succeeded | Media | City government | not public | The version that got an independent health verdict — the city's public health agency measured a quarter less nitrogen dioxide inside the pedestrianised area. |
| Green Axes EixampleBarcelona, 🇪🇸 | 2022 | Live | Scaled back | Official | City government | not public | The scale-up that stopped. Four streets were rebuilt, further expansion has been ruled out on cost, and a court has ordered part of one axis reverted. |
| Viennese Supergrätzl (Superblocks)Vienna, 🇦🇹 | 2022 | Live | Ongoing | Official | City government | not public | The copy abroad, with the evaluation built in from the start: traffic counts, microclimate modelling and a resident survey, and no outcome data claimed until they report. |
Explore the wider context
📎 Cite this project
1001 Smart Cities (2026). “Superblock Sant Antoni” — Barcelona, Spain. The Smart City Atlas. https://1001smartcities.org/projects/superblock-sant-antoni/ (last verified 2026-07-16). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.