Children, marriage and work commute: an innovative study published in the journal npj Complexity reveals that major life transitions fundamentally alter the way individuals move and experience urban environments. The paper challenges traditional urban planning models, which are based on a single average citizen profile, and argues that city designs should be sensitive to demographics.
The study is signed by researchers Alessio Cardillo, from the Faculty of Physics and the Institute of Complex Systems (UBICS) at the University of Barcelona, Mariana Macedo, from Constructor University (Germany), and Ronaldo Menezes, from the University of Exeter (United Kingdom).
The study analysed comprehensive data from the United States census using the American Community Survey, together with geographic data from OpenStreetMap. The authors explored how household structures influence commuting costs and access to essential urban resources.
A new era for urban planning
For urban planners and local politicians shaping modern cities, the study conveys an urgent message: the century-old practice of designing cities around an average citizen must end. The individuals who make up society have very different needs and desires, and cannot be treated as identical data points in an accurate model. While the classic chicken-and-egg dilemma persists - whether cities are inherently structured to accommodate families or families simply adapt to the constraints of their city - empirical data clearly show that mobility patterns differ significantly according to household arrangements.
For families considering relocating for work or those planning to welcome their first child, the study highlights critical factors in assessing how well a city fits their lifestyle, beyond mere proximity to the office: the mobility-cost trade-off, the city's friendliness and access to services.
Future European outlook
While this initial study focused on American cities, the research team aims to expand this framework globally. The main obstacle to mapping international variations is data accessibility, which remains constrained across different jurisdictions.
Expanding the research to European cities is expected to yield fascinating comparisons. "European urban centres often feature dense, historical layouts, a greater reliance on multimodal public transit, and decentralized neighbourhood amenities. This may alter the marked mobility-cost trade-offs observed in US metropolitan frameworks, which are more reliant on the use of private vehicles and characterized by more recent and planned urban development." says Alessio Cardillo, Member of the Department of Condensed Matter Physics at the UB.
"These differences, combined with the varying social policies of European countries, can substantially alter the picture presented by this study. Unfortunately, data from European countries are not always available or presented in compatible formats that allow cross-country comparison," the researcher concludes.
