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However, the share of children walking to school has continued to decline worldwide. The understanding of child-environment interactions is limited by previous studies\u2019 reliance on linear assumptions and single data sources, which obscures their inherent complexity. To address this, we developed a multi-scale analytical framework that integrates street view imagery, perceptual surveys, and geospatial data from a sample of 906 children. We used XGBoost and SHAP to disentangle the complex associations between the built environment, objective street features, subjective perceptions, and walking frequency. The model demonstrated robust performance (\n                    <jats:inline-formula>\n                      <jats:alternatives>\n                        <jats:tex-math>$R^{2}=0.60$<\/jats:tex-math>\n                        <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\">\n                          <mml:msup>\n                            <mml:mi>R<\/mml:mi>\n                            <mml:mn>2<\/mml:mn>\n                          <\/mml:msup>\n                          <mml:mo>=<\/mml:mo>\n                          <mml:mn>0.60<\/mml:mn>\n                        <\/mml:math>\n                      <\/jats:alternatives>\n                    <\/jats:inline-formula>\n                    ). The results show three main findings: (1) building density is the primary predictor; (2) subjective perceptions and objective street features outperform traditional road network morphology indicators in explanatory power; and (3) most environmental factors exhibit nonlinear relationships, manifesting as threshold effects or diminishing marginal returns. This study underscores that children\u2019s walking to school depends not merely on physical access or safety, but is significantly associated with subjective perceptions and objective street features once basic physical thresholds are met. These findings shift the focus of child-friendly planning from traditional infrastructural metrics to perceptual and experiential dimensions.\n                  <\/jats:p>","DOI":"10.1140\/epjds\/s13688-026-00621-w","type":"journal-article","created":{"date-parts":[[2026,5,28]],"date-time":"2026-05-28T12:18:46Z","timestamp":1779970726000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Evaluating perceived built environment factors influencing children\u2019s walking to school: an XGBoost\u2013SHAP approach"],"prefix":"10.1140","volume":"15","author":[{"given":"Yuanyuan","family":"Gao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingyi","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,28]]},"reference":[{"issue":"6 Suppl 3","key":"621_CR1","doi-asserted-by":"publisher","first-page":"197","DOI":"10.1139\/apnm-2015-0663","volume":"41","author":"VJ Poitras","year":"2016","unstructured":"Poitras VJ, Gray CE, Borghese MM, Carson V, Chaput J-P, Janssen I, Katzmarzyk PT, Pate RR, Connor Gorber S, Kho ME, Sampson M, Tremblay MS (2016) Systematic review of the relationships between objectively measured physical activity and health indicators in school-aged children and youth. 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