Effects of traffic patterns on vehicle pollutant emission factors in road tunnels

• Published in: Tunnelling and underground space technology Vol. 130; p. 104740
• Main Authors: Yan, Guanfeng, Wang, Mingnian, Yan, Tao, Qin, Pengcheng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2022
• Subjects: Emission factors; Field experiment; Road tunnels; Traffic pattern; Vehicle pollutant; Emission factors; Vehicle pollutant; Traffic pattern; Road tunnels; Field experiment

[Display omitted] •Air velocity of one-way two-bore tunnels is higher than that with only one bore.•A new formula is presented to predict air velocity for two-way tunnels.•Pollutant emission factors increase in two-way one-bore tunnels.•Two-way one-bore tunnels suit low-level roads with a small traf...