Particulate matter exposure at a densely populated urban traffic intersection and crosswalk

Exposure to elevated particulate matter (PM) pollution is of great concern both the general public and air quality management agencies. At urban traffic intersections, for example, pedestrians are often at a higher risk exposure near-source PM from while waiting on roadside or walking in crosswalk. This study offers an in-depth investigation pedestrian intersection. Fixed-site measurements near intersection were conducted examine variations particles various sizes through signal cycles. process aids identification major dispersion patterns roadside. In addition, mobile across six time intervals that correspond different segments pedestrian’s journey when passing Measurement results used estimate compare cumulative deposited doses by size categories Furthermore, comparisons sunny day cloudy analyzed. The indicate importance reducing intersections provide policymakers with foundation possible measures reduce intersections.