Analysis of Severe Injury Accident Rates on Interstate Highways Using a Random Parameter Tobit Model

Joint Authors

Park, Minho
Lee, Dongmin

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

Civil Engineering

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