In response to the growing challenges of sustainability, liveability, and accessibility in peri-urban regions, this thesis aims to understand how the principles of the 15-minute city model can be implemented to peri-urban contexts through the lens of public values. While the 15-minute city, originally conceptualised for urban areas, aims to localise all daily needs within a 15-minute walk or bike ride, translating it to car-dependent peri-urban areas is neither straightforward not possible within the current confinements of the concept. This research bridges that gap by exploring how a human-centric, value-based approach can inform the spatial adaptation of proximity-based planning principles in peri-urban regions, specifically focusing on the Dutch municipality of Ede.
Peri-urban areas have been overlooked in urban planning for a prolonged period of time. Characterised by highly dynamic spatial and social conditions, these areas suffer from relevant urban challenges such as car dependency, reduced access to amenities, population growth, and political distrust. All highlighting the urgent need for renewed attention towards this landscape.
To implement the relevant planning principles behind the 15-minute city in the peri-urban landscape through the lens of public values, two key frameworks are integrated together. The Public Value Sphere framework (Herzog, 2021) and the Human Needs framework (Cardoso et al., 2022) bridge the gap between the planning principles and public values, which have been specifically defined in this context. The former provides five public value sphere for the peri-urban context; economic opportunity, ecological quality, social equity, liveability, and health/safety. Each sphere encapsulated spatial public values that relate to the built environment.
The latter, rooted in Max-Neef’s theory of Human Scale Development, distinguishes between ‘needs’ and context-specific ‘satisfiers’. Be identifying diversity, proximity and accessibility as the core 15-minute city principles their five ‘needs’ are distinguished as Inclusiveness, mixed-land use, sustainability, walkability, and connectivity. By relating the concept of public values to the ‘satisfiers, this thesis constructs a conceptual framework that allows public values to spatially translate 15-minute city principles.
Empirical data extracted from focus-groups, organised for the InPUT project, a co-creation workshop with a specially developed pattern language, and a final round of digital feedback from participants formed the participatory process that enabled the specification, operationalisation and translation of public values into a spatial strategy. This pattern language serves as a tool for the designer to communicate with citizens and let them articulate their desires.
By mapping the (mis)alignment between perceived values and desired spatial outcomes, this thesis offers insights into how humans act, think, and communicate desires. The result is a set of context-specific spatial interventions that guide the implementation of 15-minute city principles through five main identified public values. It demonstrates how spatial interventions based on public values can contribute to a just and sustainable transition of the peri-urban landscape.
Ultimately, this research calls for a shift in the urban planning from time-based planning to value-based planning approach that priorities the human perspective through meaningful participation. In this approach, it is the role of the designer to understand the meaning people associate with spatial interventions and thereby understand underlying public values of stakeholders through identifying the ‘why’ behind peoples choices.
In doing so, the role of the designer becomes one of a translator, capable of identifying, articulating, and translating the public values that often remain implicit in spatial discussions. It starts with a simple question: “Why?” A question that reframes the urban planning process not as a search for the most desired solutions, but as a practice of finding values.
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There is an imbalance in the nitrogen cycle, mainly caused by an increasingly intensive agricultural sector. This leads to the degradation of nature and the loss of biodiversity. Measures have been taken at European level to reduce the amount of nitrogen emitted by the agricultural sector, but this has caused a backlash as farmers in many European countries have protested strongly. Many farmers fear for their future and something must be done to safeguard their livelihoods and the quality of Europe's nature.
To address this, we propose a vision for 2150 in which the food system of north-west Europe shifts from intensive agriculture to a regenerative, small-scale and collective farming system. We envision diversified and rotational land use to close nitrogen cycles and thus reduce the burden on the climate, giving the soil space and time to regenerate so that nature can thrive. Food and bio-based materials will be produced locally and seasonally, making food and material consumption more transparent and integrated into the daily lives of communities, transforming peri-urban and rural structures and the way we live in them. This regenerative production system, coupled with new incentives, will provide affordable food for all, while being more circular, organic, sustainable and fit for the future world we envision.
To enable diversified farms, farmers will share facilities, tools and land to enable soil-based crop rotation. This will have an impact not only on the local diet, but also on the food and materials produced. Focusing on local production also means introducing other collective infrastructures that increase local and regional flows. It also means reducing some of our international infrastructure while increasing knowledge flows between countries to empower people in the Global South to process and produce food locally, thus ensuring a more equitable distribution of resources. Finally, at the heart of the strategy is the conservation of nature, which will shape the boundaries of the newly structured peri-urban rural agricultural landscape. The existing boundaries of the built environment will remain, with the emphasis on densifying and transforming our current structures rather than expanding them.
In order to visualise the vision, we selected three pilot projects based on three different typologies and existing infrastructure: Nijkerk (sand, rural, a practical school and a milk processing unit), Utrecht (clay, urban and distribution centres) and Bodegraven (peat, peri-urban and dairy related businesses). These pilot projects show the necessary landscape transformation over time with the introduction of regenerative agriculture, food and material hubs along with food production within city boundaries, working towards a sustainable landscape and local diet.
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