A Latent Class Analysis of Single-Vehicle Motorcycle Crash Severity Outcomes
Unobserved heterogeneity has been recognized as a critical issue in traffic safety research that has not been completely addressed or often overlooked, and can lead to biased estimates and incorrect inferences if inappropriate methods are used. This paper uses a latent class approach to investigate the factors that affect crash severity outcomes in single-vehicle motorcycle crashes. Motorcycle crash data from 2001 to 2008 in Iowa were collected with a total of 3,644 single-vehicle motorcycle crashes occurring during that time period. A latent class multinomial logit model is estimated that addresses unobserved heterogeneity by identifying two distinct crash data classes with homogeneous attributes. The estimation results show a significant relationship between severe crash injury outcomes and crash-specific factors (such as speeding, run-off road, collision with fixed object and overturn/rollover), riding on high-speed roads, riding on rural roads, riding on dry road surface, riding without a helmet, age (riders older than 25 years old) and impaired riding (riders under the influence of drug, alcohol or medication). The model fit and estimation results underline the need for segmentation of crashes, and suggest that the latent class approach can be a promising tool for modeling motorcycle crash severity outcomes.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/22136657
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Supplemental Notes:
- Abstract reprinted with permission of Elsevier.
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Authors:
- Shaheed, Mohammad Saad
- Gkritza, Konstantina
- Publication Date: 2014-4
Language
- English
Media Info
- Media Type: Web
- Features: References; Tables;
- Pagination: pp 30-38
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Serial:
- Analytic Methods in Accident Research
- Volume: 2
- Issue Number: 0
- Publisher: Elsevier
- ISSN: 2213-6657
- Serial URL: http://www.sciencedirect.com/science/journal/22136657
Subject/Index Terms
- TRT Terms: Crash causes; Crash data; Crash injuries; Injury severity; Motorcycle crashes; Multinomial logits; Single vehicle crashes; Traffic safety
- Geographic Terms: Iowa
- Subject Areas: Highways; Safety and Human Factors; I80: Accident Studies; I83: Accidents and the Human Factor;
Filing Info
- Accession Number: 01542862
- Record Type: Publication
- Files: TRIS
- Created Date: Oct 30 2014 3:02PM