Crash Estimation at Signalized Intersections Along Corridors: Analyzing Spatial Effect and Identifying Significant Factors
Crash Estimation at Signalized Intersections Along Corridors: Analyzing Spatial Effect and Identifying Significant Factors
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DOI：
10.3141/1953-12
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发表时间：
2006
影响因子：
1.7
通讯作者：
M. Abdel-Aty;Xingmei Wang
中科院分区：
文献类型：
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作者：
M. Abdel-Aty;Xingmei Wang
当路口之间的距离较长时，它们可被视为相互独立的，因为它们之间的影响可以忽略不计。信号控制的路口，特别是某条走廊上距离较近的路口，在空间上是相关的，并且会在很多方面相互影响。对相关的事故频率数据使用基本的负二项回归会导致无效的统计推断，因为基于错误设定方差的检验统计量和标准误差是不正确的。广义估计方程（GEE）将广义线性模型扩展到相关数据分析中，并且能够考虑信号控制路口之间的空间相关性。在本研究中，从佛罗里达州的奥兰治县、布里瓦德县和迈阿密 - 戴德县选取了41条走廊上的476个信号控制路口。由于某些走廊上一些路口之间的距离非常长，41条走廊上的路口被划分为116个集群。空间相关的事故……
Intersections could be considered as isolated when the distance between them is long because, the influence between them is negligible. Signalized intersections, especially closer ones along a certain corridor, are spatially correlated and will influence each other in many respects. Use of the basic negative binomial regression for correlated crash frequency data leads to invalid statistical inference due to incorrect test statistics and standard errors that are based on the misspecified variance. Generalized estimating equations (GEE) provide an extension of generalized linear models to the analysis of correlated data and can account for the spatial correlation among signalized intersections. In this study, 476 signalized intersections from 41 corridors are selected in Orange, Brevard, and Miami-Dade Counties in Florida. Because the distance between some intersections along some corridors is very long, the intersections along the 41 corridors were divided into 116 clusters. The spatially correlated crash...