Investigating Pedestrians’ Exposure to Traffic-Related PM and BC at Intersections: a Case Study in Shanghai, China

As pedestrians move through cities, they are faced with different path choices. Most of the time, path choice is influenced by the length of that path or the time they spend on that path to a specific destination. When at an intersection, the same notion applies. Possible pollution exposure levels that pedestrians might face on the path choices provided at an intersection have been overlooked. In this paper, pedestrians’ exposure to Traffic Related Air Pollution (TRAP) is yet again put under the microscope. How does traffic related air pollution exposure vary, depending on the path taken at an intersection? This paper therefore, assesses pedestrians’ exposure to Particulate matter (PM) and Black Carbon (BC) on two pedestrian walking facilities at two intersections in Shanghai, China. PM and BC data was collected using mobile monitors. A prototype empirical equation that models the distribution of pollutants, without any requirement for advanced analysis was developed. The results were visualized using the Paraview software. PM concentration must be the highest on the path closest to the source; the traffic. However, there is a deviation from this hypothesis as the data shows the concentrations and exposure being higher on the footbridge in some cases. There is a high correlation between the traffic volume and the PM concentrations. Section views of the distribution of pollutants on the footbridges shows that the height of the footbridge is inversely proportional to the change in concentration of pollutants.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Maps; References; Tables;
  • Pagination: 32p

Subject/Index Terms

Filing Info

  • Accession Number: 01764145
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-03919
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:20AM