2021-2023 HSIP Cluster

The top locations where reported collisions occurred at intersections have been identified. The crash cluster analysis methodology for the top intersection clusters uses a fixed meter search distance of 25 meters (82 ft.) to merge crash clusters together. This analysis was based on crashes where a police officer specified one of the following junction types: Four way intersection, T-intersection, Y-intersection, five point or more. Furthermore, the methodology uses the Equivalent Property Damage Only (EPDO) weighting to rank the clusters. EPDO is based any type of injury crash (including fatal, incapacitating, non-incapacitating and possible) having a weighting of 21 compared to a property damage only crash (which has weighting of 1). The clustering analysis used crashes from the three year period from 2021-2023. The area encompassing the crash cluster may cover a larger area than just the intersection so it is critical to view these spatially.本研究已识别出交叉口上报碰撞事件的高发点位。针对各高发交叉口聚类的碰撞聚类分析方法采用固定25米（82英尺）的搜索距离以合并碰撞聚类。本次分析的数据集仅包含警务人员指定了以下交叉口类型的碰撞事件：四路交叉口、T型交叉口、Y型交叉口、五路及以上多岔交叉口。此外，该分析方法采用仅等效财产损失（Equivalent Property Damage Only, EPDO）权重对聚类进行排序。EPDO权重规则为：任何涉及人员伤亡的碰撞（包括死亡、完全丧失行为能力、部分丧失行为能力及疑似受伤）权重为21，而仅造成财产损失的碰撞权重为1。本次聚类分析采用了2021年至2023年这三年间的碰撞事件数据。碰撞聚类覆盖的区域范围可能超出单纯的交叉口范围，因此在空间维度上对其进行可视化分析至关重要。