Fig. 6: Platform PM2.5 and the passenger exposure estimated in the Shanghai subway network. | npj Sustainable Mobility and Transport

Fig. 6: Platform PM2.5 and the passenger exposure estimated in the Shanghai subway network.

From: A citywide spatiotemporal perspective of particulate matter concentration on underground subway platforms

Fig. 6

The figures illustrate PM2.5 concentrations estimated during the a morning, b noon, and c evening episodes on weekdays, respectively, and passenger PM2.5 exposure level during the d morning, e noon, and f evening, respectively. The exposure levels to PM were categorized into five percentile-based categories for visualization (20%, 40%, 60%, 80%, and 100%).

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