This paper is about introducing the framework of Human-Mobility Design to address the challenge of balancing technological innovation with human-centric considerations, outlining the necessity for a speculative lens to view, observe, understand the problem, and think about futuristic solutions. The framework shows the process and the course of research in a systematic way by defining the underlying concepts. The study illustrates the utilization of the framework and emphasizes the ethnography-informed speculative design as a useful approach to contribute to a more balanced and insightful discourse on the future of mobility in cities.