Citation

Jiang X, Zheng H, Qiu Y, Fan W. Traffic Injury Prev. 2015; 16(3): 289-297.

Affiliation

College of Transportation and Logistics , Southwest Jiaotong University , Chengdu , China.

Copyright

(Copyright © 2015, Informa - Taylor and Francis Group)

DOI

10.1080/15389588.2014.936012

PMID

24983398

Abstract

OBJECTIVE & Methods: In the traditional injury-severity related studies two-vehicle and three-vehicle crashes are typically considered in a combinatory manner and thus the injury casual factors for these two crash types are implicitly assumed to be the same. The paper attempts to investigate the potential discrepancy between two- and three-vehicle crash severities with the aid of continuation ratio logit model with the property of partial proportional odds.

RESULTS: The modeling results show that there are a number of significant differences between two- and three-vehicle crash injury severities in terms of the contributing factors, the magnitude of impact, and even the direction of effects.

CONCLUSIONS: The research illustrates that a series of environmental and crash factors (e.g., rear-end straight crashes, urban roadways, alcohol usage, and different driving cohorts) are statistically significant in interpreting the disparity of coefficients between two- and three-vehicle crash injury-severity models. It raises the awareness that the combined analysis of two- and three-vehicle crashes should be exercised with cautions, particularly when a safety research targets the less severe injury crashes.

Language: en