The study investigates how the 15‑minute city concept can be realised through the design of public street space, using the Leipzig‑Altlindenau neighbourhood as a concrete example. The research combines a systematic literature review, a document analysis of existing urban plans, and qualitative interviews with experts. In the interview with Dr. Thomas Pohl, the sub‑category “aspect of time street space” was identified five times, indicating that temporal dimensions are a key concern for planners. The interview transcripts were coded with MAXQDA 2022, and the resulting codes were organised into thematic summaries that served as the basis for the requirements analysis of public street space in a 15‑minute city. The thematic summaries are presented in Annex 2 together with a codebook and the coded excerpts.

The technical part of the report focuses on the design proposals that emerge from the analysis. Four core dimensions of the 15‑minute city—density, proximity, diversity, and digitalisation—are used as a framework for the design of street space. The authors introduce several new spatial concepts: a “time band” that allocates specific time slots for different activities, a “flex space” that can be reconfigured for events or markets, a “climate strip” that incorporates green infrastructure to mitigate heat, and a “movement space” that prioritises pedestrians and cyclists. These concepts are illustrated with maps and drawings produced in QGIS, Vectorworks, Adobe InDesign, and Illustrator. The design also integrates the superblock model, showing that the 15‑minute city can coexist with other urban development strategies. The authors identify and address specific deficits found in the existing street layout, such as limited usability for active mobility, insufficient vegetation, and a lack of resting places. By incorporating these elements, the design enhances the street’s functionality and sustainability.

Performance values are not expressed in quantitative terms, but the report emphasises that the proposed street‑space interventions support the six functions of the 15‑minute city—lifestyle, work, commerce, health, education, and entertainment—by ensuring that essential services are reachable within a 15‑minute walk or bike ride. The authors argue that the new street‑space concepts strengthen the four dimensions of the 15‑minute city and provide a framework for future urban planning.

Collaboration and project context are described in the introductory sections. The research was carried out by the Institute of Transport and Space at the University of Applied Sciences Erfurt, in partnership with a network of experts, including Dr. Thomas Pohl. The project ran from 2022 to 2024 and was supported by institutional funding from the university. The report is part of a broader effort to evaluate the 15‑minute city as a viable urban development model in Germany and to provide actionable design guidelines for city planners. The findings contribute to the growing body of literature on time‑based urbanism and demonstrate how public street space can be re‑imagined to meet the demands of contemporary urban life.