Barcelona's superblocks (superilles in Catalan) have become a global reference for urban transformation. By reorganizing traffic and reclaiming street space for people, the city has cut air pollution, increased green areas, and fostered community life. This article examines the superblocks model, its measurable impacts, and what Brussels can learn from it. For a broader perspective on similar urban innovations, see our guide on The Complete Guide to Urban Summit Brussels.

What Are Superblocks?

A superblock is a cluster of nine city blocks (roughly 400 by 400 metres) where through traffic is banned on internal streets, allowing only local vehicles at reduced speed (10 km/h). The perimeter roads carry all through traffic. Inside, streets become shared spaces for walking, cycling, play, and social activities. The concept was pioneered by Salvador Rueda, director of the Barcelona Urban Ecology Agency.

Key design elements include:

  • Traffic calming: speed limits of 10 km/h inside the superblock.
  • Priority for pedestrians and cyclists: widened pavements, bike lanes, and shared surfaces.
  • Green infrastructure: trees, rain gardens, and permeable pavements.
  • Public furniture and play areas: benches, tables, playgrounds, and community gardens.

Implementation in Barcelona

The first superblock was trialled in the Poblenou district in 2016. Following positive results, the city expanded to Sant Antoni (2018), Horta (2019), and others. As of 2023, Barcelona has over 10 superblocks in various stages, with plans for 500 more by 2030 under the Superblock Barcelona programme.

The transformation involves street redesign, new signage, and community engagement. Costs vary: the Poblenou pilot cost approximately €1.5 million for a 9-block area. The Sant Antoni superblock cost €10 million, including new paving, lighting, and trees.

Measurable Benefits

Studies by the Barcelona Institute for Global Health (ISGlobal) have documented significant improvements:

  • NO₂ reduction: up to 25% lower nitrogen dioxide levels inside superblocks.
  • PM10 reduction: 17% decrease in particulate matter.
  • Traffic reduction: 30-50% fewer vehicles on internal streets.
  • Noise reduction: 3-5 dB(A) lower noise levels.
  • Green space increase: up to 20% more tree canopy cover.
  • Physical activity: residents report 10% more walking and cycling.

Economic impacts include higher property values and increased foot traffic for local businesses. A 2020 study found retail sales in Sant Antoni rose 15% after the superblock was installed.

Challenges and Criticisms

Despite success, superblocks face opposition. Some residents complain about reduced parking and longer car journeys. Emergency services initially raised concerns about access, but redesigns have addressed these. Business groups in some areas argued that fewer cars would reduce customers, though evidence shows the opposite.

The city has responded with extensive public consultation. In Sant Antoni, a participatory process involved over 1,000 residents in designing the streets. The tactical urbanism approach—using temporary materials to test changes before permanent construction—helped build acceptance.

Lessons for Brussels

Brussels, with its high car dependency and air quality problems, can learn from Barcelona. The Brussels-Capital Region's Good Move plan already includes zones with limited traffic, but superblocks offer a more comprehensive model. For more on local initiatives, see the Brussels Mobility Plan.

Key takeaways:

  • Start with pilots: test in one neighbourhood, measure results, then scale.
  • Engage communities: involve residents from the start to address concerns.
  • Integrate green infrastructure: superblocks can help meet climate goals, as discussed in climate adaptation funding.
  • Combine with mobility policies: superblocks work best alongside Mobility as a Service and improved public transport.

The Brussels Mobility Plan already aims to reduce car use by 24% by 2030. Superblocks could accelerate that shift.

Future of Superblocks

Barcelona plans to create a superblock city by 2030, with 500 superblocks covering 70% of the urban area. This would require an estimated €1.6 billion investment, partly funded by the EU Green Deal. The model is also spreading to other cities: Vienna, Madrid, and Seattle have piloted similar schemes.

For Brussels, the timing is right. The 15-minute city concept, championed by Mayor Philippe Close, aligns with superblock principles. By learning from Barcelona's successes and challenges, Brussels can create healthier, more liveable neighbourhoods.

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