International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Higher Accident Rates for Older Drivers at Specific Urban Intersections Study on the Improvement of the Road Geometry

고령운전자를 고려한 도시부 교차로 기하구조 개선방안에 관한 연구

  • 정상민 (주식회사 건영이엔씨.서울시립대학교) ;
  • 최재성 (서울시립대학교 교통공학과) ;
  • 이종학 (기상청 차세대도시.농림융합 기상사업단) ;
  • 이현구 ((주)한맥기술 도로부)
  • Received : 2016.11.14
  • Accepted : 2017.03.17
  • Published : 2017.04.17
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Abstract

PURPOSES : With the increasing number of older drivers in an aging society, there is a growing need for research and planning on traffic safety for the older drivers using an improved road geometry design. This study also proposed a modified urban road interchange design, which aims to keep the older drivers away from accident-prone and high-traffic areas of the city. METHODS : In this study, we examined accident data records of older drivers to identify accident-prone zones and intersections; we studied the road geometry at these zones and analyzed if it was an underlying cause for higher number of accidents. Based on the research and subsequent analysis, we suggested plans for improvement of road geometry design at these intersections. RESULTS :By studying historic data and analyzing factors that affect the likelihood of accidents of vehicles driven by older drivers and after studying suitable traffic accident prediction models, we identified the major variables that need to be modified at accident-prone intersections, such as the width of a left turn lane at an intersection and the radius of the right turn lane at a street corner. The results have a significance probability of less than 0.001 and a 95% confidence level. To improve safety at the identified intersection, this study suggests the installation of a left-turn-lane-shaped Positive Offset and a right-turn-lane-shaped Slip Lane concept and an adjustment of intervals between intersections.

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References

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