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Evaluation of Multi-legged Roundabout Using Surveyed Critical Gap Acceptance

현장 임계간격을 이용한 다지 회전교차로 분석

  • 박순용 (한국건설기술연구원 SOC성능연구소 도로교통연구실) ;
  • 김동녕 (단국대학교 토목환경공학과) ;
  • 정준화 (한국건설기술연구원 SOC성능연구소 도로교통연구실)
  • Received : 2013.07.31
  • Accepted : 2013.09.03
  • Published : 2013.09.28

Abstract

In this paper, considering the characteristics of the driver at roundabouts by investigating the critical gap acceptance on various traffic conditions, multi-legged roundabouts were evaluated. The gap acceptance and rejection of 4-legged, 5-legged, 6-legged, and 7-legged roundabout were surveyed on real fields, and the critical gap acceptance was estimated using Raff's methods. Derived the critical gap acceptance was processed calibration and validation for micro-simulation, and then multi-legged roundabouts under variable conditions such as variations of traffic volume, turning ratio, and size of inscribed circle diameter were evaluated to verify operating conditions of roundabouts. As the results, according to the operating traffic volume and turning ratio, the inscribed circle diameters were proposed at each level of service. These inscribed circle diameters were able to reflect the guideline of geometric design for multi-legged roundabouts.

Keywords

Multi-legged Roundabout;Critical Gap Acceptance;Calibration and Validation;Roundabout Design

Acknowledgement

Supported by : 한국연구재단

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