发现近一半行人事故发生在距离路口198英尺内，揭示非路口区域安全风险分布规律。
Assessing the Role of Intersection Proximity in Pedestrian Crashes: Insights from Data Mining Approach
- 按距路口距离划分三区，用关联规则挖掘多因素交互关系
- 50%非路口行人事故发生在198英尺内，核心区（D1）占1277起
- 提出基于距离的精准干预策略，适合交通规划与安全评估者参考
尽管交叉口是道路网络中最复杂的部分，但非交叉口区域的行人事故却异常频繁，构成严重交通安全问题。本研究基于路易斯安那州2017-2021年事故数据库，分析非交叉口处行人事故特征。由于行人事故风险随距交叉口距离变化，研究采用‘距交叉口距离’这一独特框架识别非交叉口区域的事故模式差异。结果显示，约50%的非交叉口行人事故发生在距交叉口198英尺以内。研究将期间收集的3,135起非交叉口行人事故划分为三个区域：D1区为距交叉口150英尺内（1,277起），D2区为151至435英尺间（1,060起），D3区为435英尺及以上（798起）。为探究多因素复杂交互，采用直观的数据挖掘技术——关联规则挖掘，基于提升度和支持度指标共识别出60条关键规则（每区20条），另基于提升度增量准则（LIC）探索124条规则。研究结果为非交叉口行人事故成因提供了关键洞察，并依据发现提出了针对性的、问题导向的缓解措施。
原文摘要 · Abstract (English)
Although intersections are the most complex parts of the roadway network, pedestrian crashes at non-intersection locations are disproportionately frequent, highlighting a serious traffic safety concern. This study investigates non-intersection crashes involving pedestrians using a crash database (2017-2021) collected from Louisiana State. As the risk of pedestrian crashes tends to vary with distance from the intersection, the research team utilized a unique framework "distance to intersection" to capture the differences in crash patterns at non-intersection locations. The study identified that around 50% of non-intersection pedestrian crashes occurred within 198 ft. of the intersection. In the next step, the collected 3,135 pedestrian crashes at non-intersection locations during the study period were subdivided into three zones: D1 zone designates crashes occurring within 150 ft. of an intersection (1,277 crashes), D2 zone designates crashes occurring within 151 ft. to 435 ft. of an intersection (1,060 crashes) and D3 zone designates crashes occurring at 435 ft. or higher from an intersection (798 crashes). To explore the complex interaction of multiple factors, an intuitive data mining technique, Association Rules Mining was used. A total of the top 60 interesting association rules (20 for each zone) were identified by the algorithm (based on lift and support measures). In addition, a total of 124 rules were explored based on Lift Increase Criterion (LIC) measure. The findings of this research provide critical insights into pedestrian crash involvement at non-intersection locations and the variation in crash patterns according to the "distance to intersection". Based on the findings, some of the targeted problem-specific countermeasures are also recommended to address the crash patterns at non-intersection locations.
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