Recent rapid urbanization has rendered outdoor space a key quality-of-life factor, yet walkability studies especially in hot-humid climates have seldom considered human biometeorology. This site-level study investigated microclimatic functions of an overhead structure in improving walkability, and identified biometeorology-related factors influencing pedestrian behaviour. A walkway with overhead tinted glass cover, demarcated into sunny zone and shaded zone, was equipped with hanging aluminium fins. Human thermal sensation was approximated by physiologically equivalent temperature (PET) and universal thermal climate index (UTCI), both closely related to global solar radiation and black-globe temperature. Pedestrian flow was tallied by demographic factors to assess the choice between shaded or sunny zones. Compared with sunny zone, shaded zone slashed maximum global solar radiation by 432 W/m 2 in full effect to achieve 90% solar radiation reduction. The maximum cooling in air and black-globe temperatures reached 0.8 °C and 6.1 °C respectively. The overhead structure imposed minimal effect on wind field in both zones. Contrast in maximum PET and UTCI between the two zones reached 8.2 °C and 5.3 °C respectively. In shaded zone, the dominant biometeorological condition was moderate heat stress or slightly warm sensation in contrast to strong heat stress or warm sensation in sunny zone. An overall preference for shaded zone was detected. Pedestrian gender and age, namely female and elderly, were significantly associated with shaded zone preference. The findings could inspire a biometeorological perspective in understanding walking behaviour and pedestrian-friendly facilities. Biometeorological-sensitive design of artificial shade could improve walkability in urban environment that increasingly demands climate change proofing.

中文翻译：

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改善街道步行性：夏季阳光条件下人工部分遮荫结构的生物气象学评估

最近的快速城市化使户外空间成为关键的生活质量因素，但步行性研究，尤其是在炎热潮湿的气候下，很少考虑人类生物气象学。这项站点级研究调查了高架结构在改善步行性方面的小气候功能，并确定了影响行人行为的生物气象学相关因素。一条带有高架有色玻璃盖的走道，分为阳光区和阴影区，配备了悬挂式铝翅片。人体热感觉由生理等效温度 (PET) 和通用热气候指数 (UTCI) 近似，两者都与全球太阳辐射和黑球温度密切相关。根据人口统计因素计算行人流量，以评估阴影区或阳光区之间的选择。与阳光区相比，阴影区将最大的全球太阳辐射完全减少了 432 W/m 2，以实现 90% 的太阳辐射减少。空气中的最大冷却温度和黑球温度分别达到 0.8 °C 和 6.1 °C。架空结构对两个区域的风场影响最小。两个区域之间的最大 PET 和 UTCI 对比度分别达到 8.2 °C 和 5.3 °C。阴凉区的主要生物气象条件是中度热应激或微暖感，而阳光区则是强烈的热应激或暖感。检测到对阴影区域的总体偏好。行人性别和年龄，即女性和老年人，与阴影区偏好显着相关。这些发现可以激发生物气象学视角来理解步行行为和行人友好设施。