International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Estimation of Traffic Accident Effectiveness of White Left Shoulder Line Using a Comparison Group Method

비교그룹방법을 통한 백색 중앙분리대측 실선 도입의 사고감소효과 연구

  • 박시내 (서울시립대학교 교통공학과) ;
  • 임준범 (서울시립대학교 교통공학과) ;
  • 김동인 (한국도로공사 교통처) ;
  • 김진홍 (한국도로공사 교통처 교통개선부) ;
  • 최명호 (한국도로공사 교통처)
  • Received : 2016.07.06
  • Accepted : 2016.08.29
  • Published : 2016.10.17
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Abstract

PURPOSES : Visibility of lanes on the road improves as retro-reflectivity rises. This helps reduce traffic accidents at nighttime or in bad weather. This study aimed to evaluate the effects of improved visibility on reduction of traffic accidents when the color of the lane in the median of the highway was changed from yellow to white. METHODS : In order to evaluate the accident reduction effect of the white left shoulder line, Hauer (1997)'s Comparison-Group method was chosen as an analysis methodology. The JungBu-2 highway, which is equipped with the white left shoulder line and is in trial operation, was chosen as a target for analysis. Data of accidents for 10 months before and after installation was collected and analyzed. In addition to the number of accidents, the types of accidents were classified into nighttime accidents, accidents in bad weather, and median collisions. The accident reduction effect of improved visibility of lanes was analyzed. RESULTS : The analysis' finding showed that installation of the white left shoulder line decreased the number of accidents by 28%. Moreover, improvement in visibility was effective in reducing nighttime accidents by 67.63%, accidents in bad weather by 55.19%, and median collisions by 48.55%. CONCLUSIONS : Based on the analysis' results in this study, it was concluded that white left shoulder line on the freeway contributed to reduce traffic accidents, especially nighttime accidents, accidents in bad weather, and median collisions.

Keywords

References

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  1. Feasibility Analysis for White Pavement Markings in the Roadways with Median Barrier vol.20, pp.3, 2018, https://doi.org/10.7855/IJHE.2018.20.3.075