The future of urban experimentation through ten critical lessons from decades of practice

Urban experimentation has become a central strategy for city governments aiming to address climate change and sustainability. These initiatives involve place-based, temporary, and flexible projects designed to test new social and technical responses to complex urban challenges. While often promoted as a way to achieve systemic change, the authors argue that these experiments frequently fail to reach their full potential due to how they are designed, governed, and scaled.

The authors synthesize two decades of research into ten critical lessons categorized into three themes: key processes, governance and politics, and impact. A major takeaway is that urban experiments are currently too focused on technological solutions, often neglecting the social, cultural, and ecological dimensions necessary for deep systemic change. Furthermore, these experiments are rarely designed to foster cross-sectoral learning, meaning that insights gained in one domain (e.g., water) are seldom applied to others (e.g., energy).

Crucially, the authors emphasize that urban experimentation is inherently political. Experiments are not neutral arenas; they are often embedded in neoliberal governance structures that can reinforce existing power asymmetries and marginalize certain voices. The authors also highlight a significant 'Global North' bias in current literature and practice. This framing often ignores the unique, fluid, and often chaotic urban dynamics of the Global South, leading to a reliance on 'one-size-fits-all' solutions that fail to account for local institutional contexts.

To move beyond the current limitations, the authors call for a shift toward 'permanent governance practices' rather than isolated, project-based interventions. This requires balancing professional expertise with citizen-led co-creation, acknowledging the inherent political nature of these projects, and developing more pluralistic, context-sensitive approaches to scaling innovations. By moving away from technology-centric models, cities can better leverage experimentation to drive truly just and sustainable transformations.