The flue gas that is emitted by vehicles in a tunnel accumulates and cause serious pollution. A vehicle emits a large amount of flue gas as it moves. In particular emitted gaseous carbon monoxide (CO), can influence the driver drives in a long tunnel without their knowledge, affecting the safety of driving. Additionally, when a driver drives in a long tunnel, the dark and monotonous surroundings can cause eye fatigue, loss of presence of mind finally causing a car accident potentially involving a large fire and huge damage. This study elucidates how air quality and the surrounding in a tunnel can affect a driver. Fluent software is used to simulate the change in pressure a moving vehicle in a tunnel. The initial results show that the total pressure in front of a vehicle is higher than and at the back of it. The pressure is larger in the middle part of a tunnel than at its ends and pollutants may diffuse toward them. This study comprehensively elucidates air pollution in a tunnel for as an aid for the relevant government organization that must control the total number of vehicles in tunnels.
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