Highlights ► The proposed model allows a flexible ordinal response structure for injury severity. ► Spatial dependence in injury severity is explicitly accommodated. ► The model is applied to examine highway crash injury severity.

    Abstract This paper proposes a flexible econometric structure for injury severity analysis at the level of individual crashes that recognizes the ordinal nature of injury severity categories, allows unobserved heterogeneity in the effects of contributing factors, as well as accommodates spatial dependencies in the injury severity levels experienced in crashes that occur close to one another in space. The modeling framework is applied to analyze the injury severity sustained in crashes occurring on highway road segments in Austin, Texas. The sample is drawn from the Texas Department of Transportation (TxDOT) crash incident files from 2009 and includes a variety of crash characteristics, highway design attributes, driver and vehicle characteristics, and environmental factors. The results from our analysis underscore the value of our proposed model for data fit purposes as well as to accurately estimate variable effects. The most important determinants of injury severity on highways, according to our results, are (1) whether any vehicle occupant is ejected, (2) whether collision type is head-on, (3) whether any vehicle involved in the crash overturned, (4) whether any vehicle occupant is unrestrained by a seat-belt, and (5) whether a commercial truck is involved.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A spatial generalized ordered response model to examine highway crash injury severity


    Contributors:

    Published in:

    Publication date :

    2012-12-07


    Size :

    16 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English







    A multivariate random-parameters Tobit model for analyzing highway crash rates by injury severity

    Zeng, Qiang / Wen, Huiying / Huang, Helai et al. | Elsevier | 2016


    Crash Injury Severity Analysis Using Bayesian Ordered Probit Models

    Xie, Y. / Zhang, Y. / Liang, F. | British Library Online Contents | 2009