城市快速路交通事故特性分析与安全评价

doi:10.3976/j.issn.1002-4026.2022.02.014

Abstract

Abstract:

By analyzing the statistical data of traffic accidents on expressways in Jinan, this paper explores the characteristics of traffic accidents on expressways in cities from the perspectives of time and space distribution, accident types, and causes. By extracting the vehicle type ratio data and traffic flow data within 5 minutes before an accident and analyzing the regular characteristics between them and traffic accidents, an accident risk safety evaluation table based on the color scale is constructed and the critical flow of accidents is calculated according to the probability and statistical model. Finally, the accident risk safety evaluation model of an expressway is constructed based on the above data analysis. Data fitting results show that the traffic flow operation safety risk of an expressway can be evaluated in real time according to the current traffic flow and vehicle type ratio, and forewarning regarding probable accidents can be provided by regulating the current traffic flow. Based on the patterns and characteristics of expressway traffic accidents, this paper proposes measures for accident prevention and safety management to prevent accidents and improve the safety level of expressway operation.

Key words: traffic accidents, traffic flow, vehicle type ratio, critical flow of accidents

CLC Number:

U491

SHAN Ya-nan,LI Shu-bin,LIN Zhao-feng. Analysis of traffic accident characteristics and safety evaluation of urban expressways[J].Shandong Science, 2022, 35(2): 115-123.

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References 16

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	交通流量相关系数			车型比相关系数
	5 min	10 min	15 min	5 min	10 min	15 min
5 min	1.000 0			1.000 0
10 min	0.908 6	1.000 0		0.927 9	1.000 0
15 min	0.832 2	0.876 0	1.000 0	0.929 7	0.931 5	1.000 0

平均折算系数	均值	标准差	变异系数
1.5	263.318 6	91.068 8	0.345 9
2.0	265.586 7	91.055 6	0.342 8
2.5	269.998 8	91.001 3	0.337 0
3.0	270.011 0	91.023 7	0.337 1

Analysis of traffic accident characteristics and safety evaluation of urban expressways

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