Heat and air pollution persist as major public health hazards in urban environments. Yet there are gaps in the quality of information about the hazards as conditions tend to be informed by limited stationary sensors providing information at large geographic scales. Here we present the results of a study that took place in Phoenix, Arizona, to assess the efficacy of low-cost mobile sensors on public transportation vehicles to monitor fine-scale on-road heat and PM₁₀ concentrations. The goal of the study is to uncover the spatial and temporal variations of excessive heat and air pollution experienced by transit commuters, bicyclists, and pedestrians. The results show that the sensors on the buses complement the readings from stationary sensors and low-cost mobile sensors are effective for gaining fine-grained heat and air quality readings at different locations, thereby creating new insights into pockets of heat and air pollution that should be targeted for intervention.

高温和空气污染一直是城市环境中的主要公共卫生危害。然而，由于在大地理范围内提供信息的有限固定传感器往往会告知有关情况，因此有关危害的信息质量存在差距。在这里，我们展示了在亚利桑那州凤凰城进行的一项研究的结果，该研究旨在评估低成本移动传感器在公共交通车辆上监测精细道路热量和 PM _10的功效浓度。该研究的目的是揭示通勤者、骑自行车者和行人所经历的过热和空气污染的空间和时间变化。结果表明，公交车上的传感器补充了固定传感器的读数，而低成本的移动传感器可有效获取不同位置的细粒度热量和空气质量读数，从而对热量和空气污染区域产生新的见解有针对性地进行干预。