中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (10): 162-170.doi: 10.16265/j.cnki.issn1003-3033.2022.10.2546

• 公共安全 • 上一篇    下一篇

地铁站周边建成环境对交通事故风险的影响机制

戢晓峰1,2(), 乔新1,2, 普永明1,2, 卢梦媛1,2, 郝京京1,2   

  1. 1 昆明理工大学 交通工程学院,云南 昆明 650500
    2 云南省现代物流工程研究中心,云南 昆明 650500
  • 收稿日期:2022-04-10 修回日期:2022-07-28 出版日期:2022-10-28 发布日期:2023-04-28
  • 作者简介:

    戢晓峰 (1982—),男,湖北随州人,博士,教授,博士生导师,主要从事交通安全和交通规划。E-mail:

  • 基金资助:
    国家自然科学基金资助(52062024); 云南省创新引导与科技型企业培育计划项目(202004AR040022)

Influence mechanism of built environment around subway station on traffic accident risk

JI Xiaofeng1,2(), QIAO Xin1,2, PU Yongming1,2, LU Mengyuan1,2, HAO Jingjing1,2   

  1. 1 Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming Yunnan 650500, China
    2 Yunnan Modern Logistics Engineering Research Center, Kunming Yunnan 650500, China
  • Received:2022-04-10 Revised:2022-07-28 Online:2022-10-28 Published:2023-04-28

摘要:

为探究地铁站客流及周边建成环境对辐射范围内交通事故风险的影响机制,建立“5D+S”的建成环境指标体系,构建基于极度梯度提升(XG Boost)算法的事故风险模型及SHAP归因分析模型,探究建成环境与交通事故风险的非线性关系;以深圳市为例,从工作日和非工作日2个维度探究地铁站周边交通事故风险的影响机制,并与弹性网络回归(ENR)、支持向量回归机(SVR)等模型对比。研究表明:地铁站周边建成环境指标与交通事故风险存在非线性关系;当休闲娱乐兴趣点(POI)设施密度大于25个/km2时,交通事故风险较大;当购物中心可达性介于[0.3,0.5]km之间,交通事故风险较大;地铁站周边建成环境因素对工作日交通事故风险影响程度更大。

关键词: 地铁站周边, 交通事故风险, 极度梯度提升算法(XG Boost), 建成环境, SHAP归因分析

Abstract:

In order to explore the influence mechanism of subway station passenger flow and surrounding built environment on traffic accident risk within the radiation range, the "5D+S" (5D+Subway) built environment index system was established. An accident risk model based on XG Boost algorithm and a SHAP(Shapley Additive Explanation) attribution analysis model were constructed to explore the nonlinear relationship between built environment and traffic accident risk. Taking Shenzhen as an example, this paper explores the influence mechanism of traffic accident risk around subway stations from two dimensions of weekdays and non-weekdays, and compares it with the elastic network regression model and support vector regression(SVR) model. The results show a nonlinear relationship between the built environment index of subway stations and traffic accident risk. When the density of recreational points of interest (POI) is more than 25 pieces/km2, the traffic accident risk is higher. When the accessibility of shopping malls is between [0.3,0.5]km, the traffic accident risk is higher. The built environment around subway stations has a greater impact on the risk of traffic accidents on weekdays.

Key words: around subway station, traffic accident risk, extreme gradient boosting (XG Boost) algorithm, built environment, SHAP attribution analysis