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: Platform PM2.5 and the passenger exposure estimated in the Shanghai subway network.The alternative text for this image may have been generated using AI.

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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