Vehicle Emission Factors for Particulate and Gaseous Pollutants in an Urban Tunnel in Xi’an, China

<div>Sampling sites in the tunnel. The inlet sampling site was set 200 m from the inlet, and the outlet sampling site was set 200 m from the outlet in the eastbound bore.</div>

Journal of Chemistry

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Figure 1

Figure 1: Vehicle Emission Factors for Particulate and Gaseous Pollutants in an Urban Tunnel in Xi’an, China 