LLMs for Human Mobility: Opportunities, Challenges, and Future Directions
It provides a comprehensive overview for researchers and practitioners in human mobility studies, but it is incremental as it reviews existing work without introducing new methods or results.
This survey synthesizes LLM-based research on human mobility across five tasks, such as travel itinerary planning and mobility prediction, to address the scattered literature and lack of a clear overview connecting tasks, challenges, and LLM designs.
Human mobility studies how people move among meaningful places over time and how these movements aggregate into population-level patterns that shape accessibility, congestion, emissions, and public health. Large language models (LLMs) are increasingly used in this domain because many human mobility problems require reasoning about place and activity semantics, travelers' intentions and preferences, and diverse real-world constraints that are difficult to capture using coordinates and other purely numerical attributes. Despite rapid growth, the literature is still scattered, and there is no clear overview that connects human mobility tasks, challenges, and LLM designs in a consistent way. This survey therefore provides a comprehensive synthesis of LLM-based research on human mobility across five tasks, including travel itinerary planning, trajectory generation, mobility simulation, mobility prediction, and mobility semantics and understanding. For each task, we review representative work, connect core challenges to the specific roles of LLMs, and summarize typical LLM-based solution designs. We conclude with open challenges and research directions toward reliable, grounded and privacy-aware LLM-based approaches for human mobility.