Simultaneous equation modeling of freeway accident duration and lanes blocked

Yi-Shih Chung, Yu-Chiun Chiou*, Chia Hua Lin

*此作品的通信作者

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Abstract Unbiased estimates are crucial to providing correct information that is required in accident management. Whereas earlier studies have proposed various approaches to reduce the adverse effects of unobserved heterogeneity, this study proposes accelerated failure time (AFT) models of accident duration with flexible distributions of the error term and the frailty parameter. A two-stage residual inclusion (2SRI) method for identifying the effects of endogenous variable in the nonlinear AFT models is adopted. The Taiwanese freeway accident databases were used to evaluate the applicability of the proposed approach. The results reveal that AFT models with a non-monotone Log-logistic error term distribution and a gamma frailty parameter distribution outperformed those with other assumed distributions. Number of lanes blocked was found as a significant endogenous variable to accident duration; the endogenous variable effect, if not accounted for or accounted by traditional two-stage least squares estimators, would underestimate the effect of the number of lanes blocked on accident duration.

原文English
文章編號25
頁(從 - 到)16-28
頁數13
期刊Analytic Methods in Accident Research
7
DOIs
出版狀態Published - 10 7月 2015

指紋

深入研究「Simultaneous equation modeling of freeway accident duration and lanes blocked」主題。共同形成了獨特的指紋。

引用此