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Article

A Study of Freeway Weaving Section Length Based on Micro-Simulation Assessment

고속도로 엇갈림구간 적정길이에 관한 연구

Kiyoung KIM1
,
Seungjun LEE2
,
Ducknyung KIM3
,
Euntak LEE4*
,
Taewan KIM5
,
Bongsoo SON6
김 기영1
,
이 승준2
,
김 덕녕3
,
이 은탁4*
,
김 태완5
,
손 봉수6
1Ph.D. Candidate, Process of Technology Policy Cooperation, Yonsei University, Seoul 03722, Korea
2Research Fellow, Korea Expressway Corporation, Gyeonggi 18489, Korea
3Deputy Principal Researcher, Korea Expressway Corporation, Gyeonggi 18489, Korea
4Ph.D. Candidate, Department of Urban Planning and Engineering, Yonsei University, Seoul 03722, Korea
5Professor, Department of Urban Engineering, Chung-Ang University, Seoul 06974, Korea
6Professor, Department of Urban Engineering, Yonsei University, Seoul 03722, Korea
1연세대학교 기술정책협동과정 박사과정
2한국도로공사 도로교통연구원 연구위원
3한국도로공사 도로교통연구원 책임연구원
4연세대학교 도시공학과 박사과정
5중앙대학교 도시공학과 교수
6연세대학교 도시공학과 교수
*Corresponding Author
30 June 2022. pp. 411-430
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Abstract

On freeway weaving sections, traffic congestion and accidents occur frequently due to the disturbance generated by merging or diverging vehicles. To reduce the disturbance and accordingly improve Level-of-Service (LOS), an appropriate length of weaving section should be provided. According to the KHCM, the weaving section density, which is a surrogate for LOS, is determined by weaving length, traffic volume, and weaving volume ratio. However, it is not yet clear whether the KHCM accurately estimates the density for various traffic conditions. The purpose of this study is to evaluate the effects of weaving length on various traffic conditions applying microscopic traffic simulation model VISSIM. Genetic algorithm optimization method is applied to build the car-following and lane-changing models in VISSIM. The results show that weaving length is a critical determinant of LOS and short weaving length significantly increases traffic congestion. Increasing the length of the weaving section is a good countermeasure for managing traffic congestion. The amendment of KHCM regarding freeway weaving section length is suggested for future study.

Keywords
driving simulator
freeway weaving segment
Korea highway capacity manual
traffic operation
traffic safety
vissim

고속도로 엇갈림구간은 합류, 분류, 엇갈림 교통류가 서로 상충하여 교통혼잡과 교통사고 발생 가능성이 높은 구간이다. 한국도로용량편람에서는 단순히 길이만을 기준으로 엇갈림구간을 합류부 및 분류부와 구분하고 있으며, 엇갈림구간에서의 교통류 특성으로 인해 발생할 수 있는 교통문제를 완화시키는 적정 길이기준은 제시되어있지 않다. 본 연구에서는 엇갈림유형별 주행행태모형을 구축하고 엇갈림구간을 효율적으로 운영할 수 있는 길이기준 산정 모형을 개발하였다. 다양한 교통조건에 대해 미시시뮬레이션 교통분석 프로그램 VISSIM을 적용하여 고속도로 기본구간에서의 밀도-기반 서비스수준이 엇갈림구간에서 지속될 수 있는 엇갈림유형별 길이 설계기준을 제시하였다. 연구결과는 엇갈림유형과 길이기준을 지역별 교통상황에 따라 다르게 적용해야 할 필요성을 제시하고 있다. 길이기준의 적정성은 도로주행 시뮬레이터 실험으로 검증하였다.

키워드
도로주행 시뮬레이터
고속도로 엇갈림구간
한국도로용량편람
교통운영
교통안전
VISSIM
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Information
  • Publisher :Korean Society of Transportation
  • Publisher(Ko) :대한교통학회
  • Journal Title :Journal of Korean Society of Transportation
  • Journal Title(Ko) :대한교통학회지
  • Volume : 40
  • No :3
  • Pages :411-430
  • Received Date : 2022-05-27
  • Revised Date : 2022-05-30
  • Accepted Date : 2022-06-02
  • DOI :https://doi.org/10.7470/jkst.2022.40.3.411
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