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A Study of TPCLT(Twice Per Cycle Left-Turn) Operation Impact at Three-legged Signalized Intersection

3지교차로에서의 연속좌회전(TPCLT)신호운영에 관한 연구

  • Oh, Jiyeong (Dept. of Traffic Safety Eng, Gyeonggi-do Branch of Korea Road Traffic Authority) ;
  • Kim, Kicheol (Dept. of Capital area headquaters, Korea Expressway Corporation) ;
  • Lee, Choulki (Dept. of Transportation Eng., Univ. of Ajou) ;
  • Oh, Insub (Dept. of Human Resources, Korea Expressway Corporation) ;
  • Cho, Nammin (Dept. of Road Traffic, Gangwon-do Branch of Korea Expressway Corporation)
  • 오지영 (도로교통공단 경기지부) ;
  • 김기철 (한국도로공사 수도권본부) ;
  • 이철기 (아주대학교 교통시스템공학과) ;
  • 오인섭 (한국도로공사 인력처부) ;
  • 조남민 (한국도로공사 강원지역본부)
  • Received : 2017.04.06
  • Accepted : 2017.05.11
  • Published : 2017.06.30

Abstract

TPCLT(Twice Per Cycle Left-turn) operation reduces this left-turn 'spill-over' problem on an as needed basis by servicing the protected left-turn movement as a leading and a lagging left-turn. In this study, to evaluate the effectiveness of TPCLT applied to three-legged signalized intersection in Korea, the analysis was carried out using VISSIM and SSAM model analysis. The study was implemented by three cases which are TPCLT operation, non-TPCLT operation and half-cycle operation using VISSIM program. According to the 9-left-turn volume scenario, total delay and travel times of each case was analyzed by VISSIM program. The study result shows more effective applying TPCLT operaion in the present ~ +50% scenario area at the intersection in terms of total delay.

TPCLT는 한 신호주기 내에 좌회전을 두 번 주는 신호운영방법으로서, 본 연구에서는 국내에 TPCLT 신호를 시범운영 중인 교차로를 분석대상으로 VISSIM 교통모의분석 프로그램과 SSAM 모형 분석을 통해 그 효과성을 분석하고자 하였다. 분석 대상 교차로에 TPCLT 적용 전 후, 주기를 변화시킨 경우를 교통모의분석 하였으며, 9개의 좌회전교통량 시나리오를 작성하여 효과척도로 선정한 차량 당 평균 제어지체시간과 통행시간을 비교 분석하였다. 연구 결과, 총 지체시간 측면에서 현황~+50% 좌회전교통량 시나리오 구간에서 TPCLT 적용한 경우 가장 효과적인 것으로 도출되었다.

Keywords

References

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