Journal of Advanced Transportation / 2018 / Article / Fig 7

Research Article

Random Forests-Based Operational Status Perception Model in Extra-Long Highway Tunnels with Longitudinal Ventilation: A Case Study in China

Figure 7

Distributions of particular variables under different statuses.
(a) CO
(b) NO2
(c) Air velocity
(d) PM2.5
(e) HGV

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