Virtual experiment study on route choice behavior under influence of smoke level

doi:10.16265/j.cnki.issn1003-3033.2025.06.0286

Abstract

Abstract:

To investigate the influence mechanisms of smoke environments on pedestrian's evacuation route choice behavior during fires and toxic gas leakages, and to overcome the research challenges posed by ethical constraints that make real-life human experiments difficult to conduct, in this paper, a virtual evacuation experiment platform was constructed. In order to study the influence of smoke level and route length on evacuees' route choice behavior, a single-player route choice experiment was designed and carried out under the influence of smoke, taking into account the pedestrian's speed difference under different smoke scenes in real life. Results indicate that both smoke level and route length have significant influence on evacuees' evacuation route choice behavior. The evacuees prefer to choose the route with lower smoke levels and shorter length. The results of the binary logistic regression model show that compared with the route length (Odds Ratio,OR=15.516), the smoke level (OR=45.475) has a greater influence on the route choice of evacuees. However, a small number of evacuees took a risk, that is, choosing a route with higher smoke levels for evacuation. The post-experiment questionnaire results demonstrated that participants could experience a reasonably authentic evacuation process in smoke-filled environments within the virtual reality scenarios, indicating high levels of validity and reliability for the study.

Key words: human evacuation, virtual experiment, smoke level, evacuation route choice, route length

CLC Number:

X951交通运输安全

CUI Chengbo, LI Ruoyu, CHEN Juan, WANG Qiao, MA Jian. Virtual experiment study on route choice behavior under influence of smoke level[J]. China Safety Science Journal, 2025, 35(6): 174-180.

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序号	虚拟人初始生成位置	路径长度/m		Δd/m
序号	虚拟人初始生成位置	路径P_A	路径P_B	Δd/m
1	房间1	27.5	27.5	0
2	房间2	27.5	27.5	0
3	房间3	22.5	32.5	10
4	房间4	22.5	32.5	10
5	房间5	17.5	37.5	20
6	房间6	17.5	37.5	20
7	房间7	12.5	42.5	30
8	房间8	12.5	42.5	30

烟雾水平	C_s/m^-1	D_s/m	V_r/(m·s^-1)	V_w/(m·s^-1)
无烟雾	—	—	4.5	1.4
低水平	0.2	10	3.91	1.35
高水平	1	2	2.3	0.99

速度状况	烟雾水平	减少系数/s^-1
行走	低	1.5
行走	高	2
奔跑	低	2
奔跑	高	3

场景与统计量	无烟雾	低水平烟雾	高水平烟雾	总计
被试选左侧路径次数	93	102	93	288
被试选右侧路径次数	99	90	101	290
被试选左侧路径占比/%	48.44	53.13	47.94	49.83

路径P_A 烟雾水平	路径P_B烟雾水平			检验统计量χ²	p值
路径P_A 烟雾水平	无烟雾	低水平	高水平	检验统计量χ²	p值
无烟雾	79.30	97.66	99.35	261.097	0.000
低水平	35.42	85.55	98.31	863.091	0.000
高水平	10.94	24.61	61.07	472.428	0.000