Comparison of empirical Bayes and full Bayes approaches for before-after road safety evaluations

Accident Analysis and Prevention

Volumn 42, Issue 1, 2010, Pages 38-43

  Persaud, Bhagwant ^a   Lan, Bo ^a   Lyon, Craig ^a   Bhim, Ravi ^b  

^a RYERSON UNIVERSITY   (Canada)

^b iTRANS Consulting Inc   (Canada)

Author keywords

Before after studies; Empirical Bayes; Full Bayes; Road diets; Road safety treatment evaluation; Traffic signals

Indexed keywords

AFTER-TREATMENT; BAYES APPROACH; BAYESIAN; BAYESIAN APPROACHES; BEFORE-AFTER STUDY; CRASH FREQUENCY; CRASH PREDICTION; EMPIRICAL BAYES; EMPIRICAL BAYES APPROACH; FULL BAYES; REFERENCE SITES; ROAD SAFETY; ROAD SEGMENTS;

BAYESIAN NETWORKS; MATHEMATICAL MODELS; NUTRITION; TRAFFIC SIGNALS;

ROADS AND STREETS;

ARTICLE; BAYES THEOREM; CAR DRIVING; COMPARATIVE STUDY; ENVIRONMENTAL PLANNING; HUMAN; LEGAL ASPECT; METHODOLOGY; RISK ASSESSMENT; SAFETY; SOCIAL CONTROL; STATISTICS; TRAFFIC ACCIDENT;

ACCIDENTS, TRAFFIC; AUTOMOBILE DRIVING; BAYES THEOREM; ENVIRONMENT DESIGN; HUMANS; RISK ASSESSMENT; SAFETY; SOCIAL CONTROL, FORMAL;

EID: 71549120111     PISSN: 00014575     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.aap.2009.06.028     Document Type: Article

References (20)

1. Bhim, R., 2005. Observational before and after safety study of installing signals at rural intersections: using the empirical Bayes (EB) and conventional methods, M.A.Sc. Thesis, Ryerson University, Canada.
2. Carriquiry, A., Pawlovich, M.D., 2005. From empirical Bayes to full Bayes: methods for analyzing traffic safety data. http://www.dot.state.ia.us/crashanalysis/pdfs/eb_fb_comparison_whitepaper_october2004.pdf (accessed August 1, 2006).
3. Congdon P. Bayesian Models for Categorical Data (2005), John Wiley & Sons, Ltd.
4. Congdon P. Applied Bayesian Modeling (2003), John Wiley & Sons, Ltd.
5. Congdon P. Bayesian Statistical Modeling (2001), John Wiley & Sons, Ltd.
6. Gamerman D. Markov Chain Monte Carlo Stochastic Simulation for Bayesian inference (2006), Taylor & Francis, Boca Raton
7. Gilks W.R., Richardson S., and Speigelhalter D.J. Markov Chain Monte Carlo in Practice (1996), Chapman and Hall, London
8. Harkey, D., Persaud, B, Lyon, C., et al., 2008. Crash Reduction Factors for Traffic Engineering and ITS Improvements. Final Report National Cooperative Highway Research Program (NCHRP) Project 17-25 (to appear as NCHRP Report 572).
9. Hauer E. Observational Before-after Studies in Road Safety: Estimating the Effect of Highway and Traffic Engineering Measures on Road Safety (1997), Pergamon Press, Elsevier Science Ltd., Oxford, UK
10. Hauer E., Harwood D.W., Council F.M., and Griffith M. Estimating safety by the empirical bayes method: a tutorial. Transportation research record. Journal of the Transportation Research Board 1784 (2002) 126-131
11. Hauer E., Allery B., Kononov J., and Griffith M. How best to rank sites with promise. Transportation research record. Journal Transportation Research Record 1897 (2004) 48-54
12. Kate Cowles, 2005. Practical Considerations for WinBUGS Users. http://www.stat.uiowa.edu/∼kcowles/s166_2005/lect15.pdf.
13. Lan B., Persaud B., Lyon C., and Bhim R. Validation of a full Bayes methodology for observational before-after road safety studies and application to evaluation of rural signal conversions. Accident Analysis & Prevention 41 3 (2009) 574-580
14. Miranda-Moreno, L.F., and L., Fu. Traffic Safety Study: Empirical Bayes or Full Bayes? The 86th Annual Meeting of the Transportation Research Board, TRB 2007. Paper 07-1680.
15. Miaou S., and Lord D. Modeling traffic crash-flow relationships for intersections: dispersion parameter, functional form, and Bayes versus empirical Bayes methods. Transportation research record. Journal of the Transportation Research Board 1840 (2003) 31-40
16. Pawlovich M.D., Li W., Carriquiry A., and Welch T. Iowa's experience with "road diet" measures: impacts on crash frequencies and crash rates assessed following a Bayesian approach. Transportation research record. Journal of the Transportation Research Board 1953 (2006) 163-171
17. Persaud B.N., Lyon C., and Nguyen T. Empirical Bayes procedure for ranking sites for safety investigation by potential for safety improvement. Transportation Research Record 1665 (1999) 7-12
18. Persaud B., and Lyon C. Empirical Bayes before-after safety studies: lessons learned from two decades of experience and future directions. Accident Analysis & Prevention 39 3 (2007) 546-555
19. Spiegelhalter D., Thomas A., Best N., and Lunn D. WinBUGS Version 1.4 User Manual (2003), MRC Biostatistics Unit, Cambridge. http://www.mrc-cam.ac.uk/bugs http://www.mrc-cam.ac.uk/bugs
20. Wang X., Abdel-Aty M., and Brady P.A. Crash estimation at signalized intersections: significant factors and temporal effect, transportation research record. Journal of the Transportation Research Board 1953 (2006) 10-20