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<p>Cycling has become one of the most popular commuting methods in most cities in China. Due to climate change and the urban heat island effect, cyclists in hotter summer cities such as Fuzhou face severe heat exposure risks. Few studies research the impact of street spatial characteristics on thermal comfort during cycling commuting. To identify the relationship between street space characteristics and cyclists' thermal comfort, this study innovatively employed mobile observations to gather microclimate indices that reflect population exposure levels from a cyclist's perspective. Additionally, high-precision indices were obtained from manually acquired street-view images. The Normalized Difference Vegetation Index (NDVI) was then calculated, and the contributions were determined. The results showed that there were differences in thermal comfort on different segments of the cycling trip. The variabilities of thermal comfort along the cycling route were caused by different indices of street characteristics. Thermal discomfort areas had a high sky view index (SVI), construction view index (CVI), road and pavement view index (R&amp;PVI), while green view index (GVI) and NDVI were lower. SVI contributed the most to THI, reaching 26.43%. This indicated that SVI played an important role in thermal comfort. Moreover, moderate control of sky visibility and vegetation characteristics could help improve thermal comfort. A range of design strategies were proposed to mitigate the heat risk of urban cyclists and contribute to the Sustainable Development Goals (SDGs).</p>

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Impacts of street characteristics on cyclists’ thermal exposure based on self-collected street-view images and meteorology in Fuzhou, China

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Xingyu Cui,
  • Haibin Hu

摘要

Cycling has become one of the most popular commuting methods in most cities in China. Due to climate change and the urban heat island effect, cyclists in hotter summer cities such as Fuzhou face severe heat exposure risks. Few studies research the impact of street spatial characteristics on thermal comfort during cycling commuting. To identify the relationship between street space characteristics and cyclists' thermal comfort, this study innovatively employed mobile observations to gather microclimate indices that reflect population exposure levels from a cyclist's perspective. Additionally, high-precision indices were obtained from manually acquired street-view images. The Normalized Difference Vegetation Index (NDVI) was then calculated, and the contributions were determined. The results showed that there were differences in thermal comfort on different segments of the cycling trip. The variabilities of thermal comfort along the cycling route were caused by different indices of street characteristics. Thermal discomfort areas had a high sky view index (SVI), construction view index (CVI), road and pavement view index (R&PVI), while green view index (GVI) and NDVI were lower. SVI contributed the most to THI, reaching 26.43%. This indicated that SVI played an important role in thermal comfort. Moreover, moderate control of sky visibility and vegetation characteristics could help improve thermal comfort. A range of design strategies were proposed to mitigate the heat risk of urban cyclists and contribute to the Sustainable Development Goals (SDGs).