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A Study on Real Time Signal Metering Operation at Roundabouts by Considering Queue Clearance Time

대기행렬 소거시간을 고려한 회전교차로 실시간 신호미터링 운영 연구

  • Lee, Sol (Dept. of Civil and Environmental Engineering, Kongju National University) ;
  • Ahn, Woo-Young (Dept. of Civil and Environmental Engineering, Kongju National University) ;
  • Lee, Seonha (Dept. of Civil and Environmental Engineering, Kongju National University) ;
  • Cho, Han-Seon (Dept. of Road Transport Research, The Korea Transport Institute)
  • 이솔 (국립공주대학교 건설환경공학과) ;
  • 안우영 (국립공주대학교 건설환경공학부) ;
  • 이선하 (국립공주대학교 건설환경공학부) ;
  • 조한선 (한국교통연구원)
  • Received : 2018.11.12
  • Accepted : 2018.11.22
  • Published : 2018.12.31

Abstract

Roundabouts are generally installed at which traffic and pedestrian volume is relatively small intersections, and hence traffic can flow one direction around a circular island without traffic lights. A number of researches for roundabout signal metering have been processing ways to deal with operation efficiency drops in conditions of unusual traffic and pedestrian volume increases. However, there is still a shortcoming exists in previous operation algorithm does not consider the hidden vehicles between yield lines and detectors and queueing vehicles in circular lanes. These queueing vehicles between them can be cleared by introducing the queue clearance time. The purpose of this research is developing a real time signal metering operation algorithm by considering the vehicle queue clearance time. The results of varying queue clearance time application show that there is a substantial average vehicle delay reduction in VISSIM Com-Interface simulation. When the total number of entering vehicle is 3,200~4,800 vehicle/hour with varying queue clearance time application 21~50 seconds gives average delay reduction per vehicle by 16.1~71.7%.

회전교차로(Roundabouts)는 비교적 교통량과 보행자가 적은 교차로에 신호등 없이 설치되어 원형교통섬을 한 방향으로 회전하여 통행하는 비신호 교차로이다. 회전교차로 설치이후 비정상적인 교통수요 발생 및 보행량 증가 시 운영효율성 감소에 따른 대처방안으로 회전교차로 신호미터링(Signal Metering)에 대한 연구가 다수 진행되고 있다. 그러나 기존의 신호미터링 운영 알고리즘(Algorithm)은 양보선과 검지기간 사각지대 및 회전차로에 존재하는 차량의 대기행렬을 고려하지 못하는 단점이 존재한다. 따라서 본 연구에서는 대기행렬 소거시간(Queue Clearance Time)을 고려한 실시간 회전교차로 신호미터링 운영 알고리즘을 제시하고 VISSIM의 Com-Interface를 활용하여 그 효과를 분석하였다. 분석결과 총 진입교통량 3,200~4,800대/시에 대기행렬 소거시간 21~50초를 적용 시 차량 당 평균지체가 16.1~71.7%까지 크게 감소하는 것으로 분석되었다.

Keywords

References

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