Viennese Supergrätzl (Superblocks)
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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Vienna's flagship 'Supergrätzl' pilot in Favoriten (10th district) reorganised traffic around Herzgasse school with diagonal filters that cut through-traffic while preserving resident/emergency access, and unsealed 7,000 m² for greenery, water features and seating. Opened May 2026 after 2021–2025 planning/construction. A formal evaluation (traffic counts, microclimate modelling, resident survey via mitgestalten.wien.gv.at) runs through September 2026 — no outcome data published yet.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Sources
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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. |
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📎 Cite this project
1001 Smart Cities (2026). “Viennese Supergrätzl (Superblocks)” — Vienna, Austria. The Smart City Atlas. https://1001smartcities.org/projects/vienna-supergraetzl/ (last verified 2026-07-22). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.