DOI QR코드

DOI QR Code

A Study on Practical Method of Utility Curve for Deciding Priority Order of the Improvements in Traffic Safety Audit

교통안전진단 개선방안들의 우선순위 산정 연구

  • Choi, Ji Hye (Department of Transportation Engineering, University of Seoul) ;
  • Kang, Soon Yang (Department of Transportation Engineering, University of Seoul) ;
  • Hong, Ji Yeon (Department of Transportation Engineering, University of Seoul) ;
  • Lim, Joon Beom (Department of Transportation Engineering, University of Seoul)
  • 최지혜 (서울시립대학교 교통공학과) ;
  • 강순양 (서울시립대학교 교통공학과) ;
  • 홍지연 (서울시립대학교 교통공학과) ;
  • 임준범 (서울시립대학교 교통공학과)
  • Received : 2016.01.28
  • Accepted : 2016.06.14
  • Published : 2016.06.30

Abstract

Recently, a massive loss of life and property is occurring in Korea due to traffic accidents, with the rapid increase in cars. For improvement of traffic safety, the Korea Transportation Safety Authority intensively analyzes accident data in local governments with low traffic safety index, performs a field investigation to extract problems and offers local governments improvements for problems, by conducting the 'Special Survey of Actual Conditions of Traffic Safety' each year, starting 2008. But local governments cannot strongly push forward the improvement projects due to the limited budget and the uncertainty of the improvement plan effects. Therefore, this study suggested a model which applied the Utility concept to the AHP theory, in order to efficiently decide a priority of the improvement plans in accident black spots in consideration of the limited budget of local governments. The number of accidents in each spot for improvement and accident severity, traffic volume, pedestrian volume, the improvement project cost and the accident reduction effect were chosen as evaluation factors for deciding a priority, and data about the improvement plan costs and the accident reduction effects, traffic accidents and traffic volume in the spots to undergo the special research on the real condition of traffic accident in the past were collected from the existing studies. Then, regression analysis was carried out and the Utility Curve of each evaluation factor was computed. Based on the AHP analysis findings, this study devised a priority decision method which calculated the weight and the utility function of each evaluation factor and compared the total utility values. The AHP analysis findings showed that among the evaluation factors, accident severity had the biggest importance and it was followed by the improvement plan cost, the number of accidents, the improvement effect, traffic volume and pedestrian volume. The calculated utility function shows a rise in utility, as the variables of the 5 evaluation factors; the number of accidents, accident severity, the improvement plan effect, traffic volume and pedestrian volume increase and a fall in utility, as the variables of the improvement plan cost increase, since the improvement plan cost is included in the budget spent by a local government.

Keywords

References

  1. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2008.
  2. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2009.
  3. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2010.
  4. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2011.
  5. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2012.
  6. Korea Transportation Safety Authority, "Report for Special Research on the Real Condition of Traffic Safety", 2013.
  7. T. Creasey and K. R.Agent, "Development of Accident Reduction Factors", Kentucky Transportation Cabinet, pp.12-67, 1985.
  8. J. A. Um, "AHP-based Decision Model for Safety Improvement Projects for Hazardous Section of Urban Roadways, Master's thesis, Yeong-San University, 2012.
  9. S. B. Jung, B. H. Hwang, N. M. Sung and S. H. Lee, "Development of Evaluation Model for Black Spot Improvement Priorities by using Emperical Bayes Method", Journal of Korea Society of Transportation, Vol. 27, No. 3, pp. 81-90, 2009.
  10. H. C. Kang, "A Study on Practical Method of AHP for Deciding Priority Order of Facility Investment in High Accident Location", Master's Thesis, Myeon-Ji University, 2001.
  11. K. Y. Park, T. H. Kim, S. U. KIM and S. B. LEE, "Comparing the Effectiveness of Road Safety Features by Spatial Scope of Safety Improvement Project", Journal of Korean Society of Transportation, Vol.24, No.4, pp.31-42, 2006.
  12. J. T. Kim, "Pedstrian Accident Prevention Crosswalk due to the Installation of Night Lighting Effects Analysis", Master's Thesis, Chon-Nam National University, 2013.
  13. S. H. Lee, Y. D. Lee and M. S. Do, "Safety Impacts of Red Light Enforcement on Signalized Intersections", Journal of Korean Society of Transportation, Vol.30, No.6, pp.93-102, 2012.
  14. B. E. Kim and Y. I. LEE, "'Impacts of Pre-signals on Traffic Crashes at 4-leg signalized Intersections", Journal of Korean Society of Road Engineers, Vol.15, No.4, pp.135-146, 2013.
  15. D. S. Kang at el., "'Effects of Traffic Islands on Traffic Accidents Reduction", Journal of Korean Society of Transportation, Vol.28, No.2, pp.21-32, 2010.
  16. K. H. Kim, J. H. Kim, J. W. Kim, S. B. Lee, "Estimation of Accident Effectiveness Based Upon The Location Of Traffic Signal using C-G Method", Journal of Korean Society of Civil Engineers, Vol. 28, No.6, pp.775-789, 2008.
  17. D. K. Lee and H. W. Oh, "A Study of Pavement Marking Retroreflectivitys" Proceedings of Autumn Conference of Korean Society of Transportation, pp.1-6, 2002.
  18. K. S. Kim and S. R. Kang, "A Study of the Analysis on the Accident Reduction Effect of the Median", Journal of Korean Society of Transportation, Vol.21 No.2, pp.45-60, 2003.
  19. C. U. Doo, H. S. Kim, K. H. Kim, S. B. Lee and H. J. Jo, Traffic Safety Engineering, Chung Moon Gak, pp. 167-169, 2013.
  20. K. Y. Park, "Evaluation of Accident Reduction Effect of Road Safety Features and Development of Estimation Model for Accident Reduction Factors", Doctorate thesis, University of Seoul, 2006.
  21. R. Elvik and T. Vaa, "The Handbook of Road Safety Measures", 2004.
  22. S. J. Kim and Y. J. Lee, "A Safety Evaluation of Shoulder Rumble Strips on Freeways", Proceedings of Spring Conference of Korean Society of Transportation, pp.517-522, 2009.
  23. J. D. Bullough, E. T. Donnelll and Mark S. Rea, "To Illuminate or not to Illuminate - Roadway Lighting as it Affects Traffic Safety at Intersections", 2002.
  24. B. I. Im and Y. T. Son, "The Effect Analysis on the Rumble Strip Using Empirical Bayes Method", Proceedings of Autumn Conference of Korean Society of Transportation, pp.412-417, 2007.
  25. B. N.Persaud at el., "Crash Reduction following Installation of Centerline Rumble Strips on Rural Two-lane Roads", 2004.
  26. W. Hu and A. T. McCartt and E. R. Teoh, "Effects of Red Light Camera Enforcement on Fatal Crashes in Large US Cities", Journal of Safety Research, Vol. 42, No. 4, pp. 277-282, 2011. https://doi.org/10.1016/j.jsr.2011.06.002
  27. Y. S. Kim, "Effectiveness Assessment Methodology of Red Light Cameras on Crash Reduction by Considering Enforcement Area of Cameras", Doctorate Thesis, University of Seoul, 2014.
  28. J. J. Park, J. C. Park and T. J. Ha, "An Effect of Lighting Facilities on Crosswalk Accident", Journal of Korean Society of Transportation, Vol. 26, No. 2, pp. 25-33, 2008.