Locations and spatial patterns of urban expansion in a city-regional context

在城市增长受到限制的阶段之后，城市住区的扩大和发展现在又回到了城市发展政策和规划辩论和活动的议程上。联合项目“再城市化时代的城市扩展”的这一分项目（TP 4）的兴趣在于德国城市群在最近的城市扩展过程中出现的空间结构。拟议的项目旨在详细记录、系统化和评估这些空间结构。该研究考察了郊区开发项目在各自城市区域背景下的位置，并询问这些项目如何改变现有的定居结构，以及它们产生的功能和社会空间模式和质量。在此基础上，它评估是否，我。例如，最近的城市扩展过程在多大程度上实际上符合规划目标和指导原则，特别是他们所承诺的区域规划的原则和目标，以及他们是否能够实现与之相关的住房政策期望。研究开始于全国范围内，spatialle明确的库存最近的城市扩展过程。然后，利用联合项目的五个案例研究区域（样带）更深入地审查调查结果。为此目的，一方面，将分析新建立的定居区和公共服务地点在空间结构和交通基础设施方面与现有定居区和开放空间的关系。另一方面，研究将探讨最近的城市扩张项目在多大程度上满足了住房市场的现有需求。最后，本研究将探讨在城市-区域背景下规划和设计住宅城市发展的机会，因为跨市城市发展政策被视为城市群可持续发展的先决条件。这里的重点是各地方当局的利益和冲突，以及为处理现有利益冲突而提出的办法和手段。在方法上，该项目一方面以地理信息系统分析为基础，必要时辅以现场观察，另一方面以各种经验社会科学方法为基础（文件分析、新闻分析、专家访谈、统计数据的二级分析）。后者被用来确定社会空间结构（无法视觉记录），并重建空间规划的代表，但也是公众的观点，对最近的城市扩张事件。

After a phase of restrained urban growth, the expansion and development of urban settlement areas is now back on the agenda of urban development policy and planning debates and activities. The interest of this sub-project (TP4) of the joint project "Urban Expansion in Times of Reurbanisation" is directed at the spatial structures that are emerging in the course of recent urban expansion processes in urban agglomerations in Germany. The proposed project aims at recording, systematising and assessing these spatial structures in detail. The research examines the location of suburban development projects in their respective urban-regional context and asks how these projects change the existing settlement structure and what functional and socio-spatial patterns and qualities they produce. On this basis, it assesses whether, i. e., to what extent, the urban expansion processes of the recent past actually meet the planning objectives and guiding principles, and in particular the principles and objectives of regional planning, to which they are committed, and if they are able to fulfil the housing policy expectations associated with them. The research begins with nationwide, spatialle explicit inventory of recent urban expansion processes. The findings are then examined in greater depth using the five case study regions (transects) of the joint project. For this purpose, on the one hand, an analysis will be carried out on how the newly created settlement areas and locations of public services are related to existing settlement areas and open spaces in terms of spatial structure and transport infrastructure. On the other hand, the research will examine to what extent the recent urban expansion projects meet the existing demand on the housing market. Finally, the research will explore opportunities of planning and designing residential urban development in a city-regional context, as cross-municipal urban development policies are seen as a prerequisite for the sustainable development of urban agglomerations. The focus here is on the interests and conflicts of the various local authorities as well as on the approaches and instruments proposed for dealing with existing conflicts of interest. Methodologically, the project is based, on the one hand, on GIS analyses supplemented, if necessary, by on-site observations and, on the other hand, on various methods of the empirical social sciences (document analysis, press analysis, expert interviews, secondary analysis of statistical data). The latter are used to determine socio-spatial structures (which cannot be visually recorded) and to reconstruct the perspectives of representatives of spatial planning, but also of the public, on recent urban expansion events.