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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Diagonal filters keep through-traffic out around a school, and 7,000 m² was unsealed for greenery and seating. The evaluation runs through September 2026, so no outcome data exists 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 →Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 8 more in Vienna · 🚦 Traffic management guide · 🚲 Mobility projects
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.
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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.