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Analysis of Severe Injury Accident Rates on Interstate Highways Using a Random Parameter Tobit Model
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-02-02
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
In this study, a random parameter Tobit regression model approach was used to account for the distinct censoring problem and unobserved heterogeneity in accident data.
We used accident rate data (continuous data) instead of accident frequency data (discrete count data) to address the zero cell problems from data where roadway segments do not have any recorded accidents over the observed time period.
The unobserved heterogeneity problem is also considered by using random parameters, which are parameter estimates that vary across observations instead of fixed parameters, which are parameter estimates that are fixed/constant over observations.
Nine years (1999–2007) of panel data related to severe injury accidents in Washington State, USA, were used to develop the random parameter Tobit model.
The results showed that the Tobit regression model with random parameters is a better approach to explore factors influencing severe injury accident rates on roadway segments under consideration of unobserved heterogeneity problems.
American Psychological Association (APA)
Park, Minho& Lee, Dongmin. 2017. Analysis of Severe Injury Accident Rates on Interstate Highways Using a Random Parameter Tobit Model. Mathematical Problems in Engineering،Vol. 2017, no. 2017, pp.1-6.
https://search.emarefa.net/detail/BIM-1191730
Modern Language Association (MLA)
Park, Minho& Lee, Dongmin. Analysis of Severe Injury Accident Rates on Interstate Highways Using a Random Parameter Tobit Model. Mathematical Problems in Engineering No. 2017 (2017), pp.1-6.
https://search.emarefa.net/detail/BIM-1191730
American Medical Association (AMA)
Park, Minho& Lee, Dongmin. Analysis of Severe Injury Accident Rates on Interstate Highways Using a Random Parameter Tobit Model. Mathematical Problems in Engineering. 2017. Vol. 2017, no. 2017, pp.1-6.
https://search.emarefa.net/detail/BIM-1191730
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1191730