Understanding polyrationalities of space, actors, and policies on suburban densification (SUBDENSE)

越来越多的人搬到城市，城市变得越来越密集，空间越来越稀缺。因此，房价上涨，导致城市中心的中产阶级化和流离失所。与此同时，郊区致密化的潜力尚未开发。这种郊区密集化有可能缓解住房短缺的负面影响。此外，城市规划认为，通过减少土地净吸收，高密度化对减缓和适应气候变化至关重要。但郊区的密集化是棘手的，因为它遇到了空间、演员和政策的多元理性。空间的多元理性意味着郊区是由其土地所有者以社会方式构建和构思的，而不是一种逻辑，而是多种空间概念——空间作为领土、经济资产、社会地位等——共存。此外，郊区往往存在强烈的变革阻力，阻碍了致密化的实施。这种抵制源于行动者——即土地所有者和地方利益相关者——对致密化的不同解释。此外，国家或城市规划的郊区密集化政策会遇到区位特定的空间政治。公共政策干预土地-土地政策-没有考虑到这些政策的多重理性被认为是失败的。该项目旨在更好地理解郊区密度化的空间、参与者和政策的多重合理性。它将探讨不同的土地政策策略如何与土地所有者和当地利益相关者的利益和机构相互作用，以塑造郊区密度及其对不同规划系统中的郊区的影响。这个项目的目标是方法论和理论上的挑战。在案例研究中深入分析了致密化过程。为了探索多元理性，数据科学和空间分析在这个项目中与社会人类学方法（文化理论）和跨不同制度背景的空间规划相结合。这样的努力意味着将来自不同学科的知识、方法和理论结合起来，能够单独揭示每个元素（空间、参与者和政策）的多理性性，并结合起来。最终，SUBDENSE结合地理空间和社会人口数据来分析和提供多元理性的信息。这需要评估和提高数据的适用性，以便对地面上的致密化现象进行理解的比较分析，以及在致密化仪表板中进行沟通和决策。

More and more people move to cities, urban areas become denser, space more scarce. As a consequence, house prices increase, leading to gentrification and displacement in city centres. At the same tim e, there is untapped potential for densification in suburban areas. Such suburban densification bears the potential of alleviating the negative consequences of housing shortage. In addition, densification is considered critical by urban planning to tackle climate change mitigation and adaptation by reducing net land uptake.But suburban densification is tricky as it meets plural rationalities of space, actors, and policies. Plural rationalities of space entail that suburban areas are socially constructed - conceived - by its landowners not by one logic, but multiple conceptions of space - space as territory, as economic asset, as social status, etc - coexist. In addition, there is often strong resistance to change in suburban areas, impeding the implementation of densification. Such resistance stems from different interpretations of densification by actors - i.e. landowners and local stakeholders. Furthermore, suburban densification policy by national or urban planning meets locationally specific politics of space. Public policy interventions in land - land policy - that does not take into account these plural rationalities of policy are deemed to fail.This project seeks to better understand the polyrationalities of space, actors and policies on suburban densification. It will explore how diverse strategies of land policy interact with landowners' and local stakeholders' interest and agency to shape suburban densification and their impact on suburbia across different planning systems.There are methodological and theoretical challenges with this aim of the project. Densification processes are analyzed in-depth in case studies. To explore polyrationalities, data science and spatial analysis is combined in this project with socio-anthropological approaches (Cultural Theory) and spatial planning across different institutional contexts. Such an endeavour implies to combine knowledge, methodologies and theories from different disciplines, able to reveal polyrationalities of each element alone - space, actors, and policies - and in combination. Ultimately, SUBDENSE combines geospatial and socio- demographic data to analyse and inform on polyrationalities. This entails to assess and enhance the fitness of data for comparative analysis of understanding densification phenomena on the ground as well as for communication and decision-making in a densification dashboard.