Discussing Urban Mega Projects – Assessment, Arguments and Decisions

自战后以来，大型项目一直是西方社会城市发展和规划的一种基本形式。然而，缺乏关于这些项目的规划理论，既承认国际大型项目研究和社会科学方法，又具有独立的相关性。作为对这一理论形成的一种贡献，拟议的研究项目将对通常与(交通)基础设施项目有关的大型项目研究的核心结果进行实证审查，以确定它们是否可转移到市中心规划区、城市规划及其影响以及地方政治话语和决策。它还将使人们对当地规划文化和城市规模的重要性有更深入的了解。为此，该研究项目侧重于在成本效益计算、公众舆论和城市设计问题之间关于大型项目的有效性和后果的经常相互冲突的论述。这些不同的论点是在复杂的决策和执行过程中事前提出的，需要进行事后评估。经验混合方法旨在通过对1990年至2019年德国居民超过5万人的城市的大型项目规划进行系统调查，以及对9个个案研究的示范性重点，来创造广泛和深入的洞察力。

Mega projects have been an essential form of urban development and planning in western societies since the post-war period. Nevertheless, there is a lack of planning theory on these projects that would acknowledge international mega project research and social science approaches, but also have independent relevance. As a contribution to the formation of such a theory, the proposed research project will empirically review the central findings of mega project research, which is usually related to (transport) infrastructure projects, for their transferability to inner-city planning areas, urban plan-making and its effects as well as local political discourses and decision making. It will also generate insights on the importance of local planning culture and city size. For this purpose, the research project focuses on the often conflicting discourses about the effectiveness and consequences of mega projects between cost-benefit calculations, public opinion and urban design issues. The different arguments, formulated ex ante in the context of complex decision-making and enforcement processes, will be subject to an ex-post evaluation. An empirical mixed-methods approach is designed to create both broad and deep insights through a systematic survey of mega project planning in German cities with more than 50,000 inhabitants between 1990 and 2019, as well as an exemplary focus on nine individual case studies.