考虑时空相关的交通事故热点道路识别方法

IDENTIFICATION APPROACH OF TRAFFIC CRASH HOTSPOT ROAD CONSIDERING SPATIOTEMPORAL CORRELATIONS

目前交通事故热点道路分析多以交通事故为研究对象,较少考虑交通事故-道路的时空相关性,影响方法的实用性。针对上述问题,从交通设施管理部门角度出发,以道路为研究对象,给出交通事故-道路时空相关的定义,提出交通事故空间聚合算法,构建交通事故时空立方体,并进行线模式的热点道路分析。验证结果表明,该方法可直接发现交通事故热点道路,分析结果更为精细和准确,提升了交通事故高发道路识别的实用性。

Previous studies of analysis of road hotspots focuses on traffic crashes,neglecting the spatiotemporal correlation between traffic crashes and roads,which affects the practicability of the method.Aiming at the problem,from the perspective of the transportation facility management department,this paper took the road as the research object,defined the traffic crash-road spatiotemporal correlation,proposed the traffic crash spatial aggregation algorithm,built a space-time cube of traffic crashes,and performed the line mode hotspot analysis.The verification results show that the approach can directly find the road hotspots of traffic crashes,and can get more precise and accurate results,which improves the practicability of road crashes identification.