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Walking is a low-cost, accessible, and generally safe form of physical activity and active travel, making street environment renewal essential for promoting walking among high-stress, physically inactive young people. However, existing studies rarely integrate accessibility into street planning under resource constraints. Using Nanjing's urban area as a case study, we examined the dynamic evolution of street space quality (SSQ) and young people's walking willingness (YPWW) from 2014 to 2022. Image-based seasonal correction was conducted using the CycleGAN model. SSQ was evaluated using Mask2Former, while YPWW was assessed using TrueSkill and ResNet50. Street accessibility was measured using the sDNA model to identify priority zones. The XGBoost–SHAP model was further applied to reveal the influence mechanisms of street view perceptions. Results show that high SSQ and YPWW areas clustered in the Gulou–Xuanwu–Qinhuai–Jianye junction and expanded over time; spatial green index and sky openness index were key drivers of different walking contexts. This study supports targeted street renewal to enhance youth walking under limited resources.
Xu et al. (Wed,) studied this question.