论文标题
人口稠密的城市交通和人行横道处的颗粒物暴露
Particulate Matter Exposure at a Densely Populated Urban Traffic Intersection and Crosswalk
论文作者
论文摘要
公众和空气质量管理机构都非常关注颗粒物污染的升高。例如，在城市交通十字路口，行人在路边等待时或在人行横道上行走时，经常会面临较高的风险遭受近源PM污染的风险。这项研究对城市交通交叉路口的行人暴露于PM污染进行了深入的调查。进行了城市交叉点附近的固定位置测量，以检查各种大小的颗粒通过交通信号循环的变化。该过程有助于识别路边的主要PM分散模式。此外，通过六个时间间隔进行了行人对PM的移动测量，这些时间间隔与行人通过交叉路口时的不同部分相对应。测量结果用于估计和比较在交叉路口的大小类别和行人的累积沉积PM剂量。此外，分析了阳光明媚的日子和阴天的人行人暴露与PM的比较。结果表明，减少交叉路口的PM污染的重要性，并为决策者提供了基础，以减少在城市交通交叉点减少行人PM暴露的措施。
Exposure to elevated particulate matter pollution is of great concern to both the general public and air quality management agencies. At urban traffic intersections, for example, pedestrians are often at a higher risk of exposure to near-source PM pollution from traffic while waiting on the roadside or while walking in the crosswalk. This study offers an in-depth investigation of pedestrian exposure to PM pollution at an urban traffic intersection. Fixed-site measurements near an urban intersection were conducted to examine the variations in particles of various sizes through traffic signal cycles. This process aids in the identification of major PM dispersion patterns on the roadside. In addition, mobile measurements of pedestrian exposure to PM were conducted across six time intervals that correspond to different segments of a pedestrian's journey when passing through the intersection. Measurement results are used to estimate and compare the cumulative deposited doses of PM by size categories and journey segments for pedestrians at an intersection. Furthermore, comparisons of pedestrian exposure to PM on a sunny day and a cloudy day were analyzed. The results indicate the importance of reducing PM pollution at intersections and provide policymakers with a foundation for possible measures to reduce pedestrian PM exposure at urban traffic intersections.
