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자율협력주행차 환경의 고속도로 공사구간 동적합류 및 차로변경 통합제어전략 개발

Development of Integrated Traffic Control of Dynamic Merge and Lane Change at Freeway Work Zones in a Connected and Automated Vehicle Environment

김선호|김용주|이청원|가동주
한국ITS학회 (The Korean Society of Intelligent Transport Systems)|2020.06|한국ITS학회 논문지 (Journal of Korean Society of Intelligent Transport Systems)|제19권 제3호|pp. 38-51|DOI https://doi.org/10.12815/kits.2020.19.3.38

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참고문헌

키워드

교통관리Work zone공사구간자율협력주행차통합제어전략Traffic managementConnected and automated vehicleIntegrated traffic control

초록

고속도로에서 공사로 인한 차로폐쇄가 발생하면 병목이 형성되어 혼잡이 발생한다. 따라서공사구간의 도로 운영효율을 개선하기 위해 다양한 교통관리전략이 개발되었으며, 대표적으로 공사구간 상류에 운영하는 합류제어가 있다. 일반차 환경에서는 혼잡시 운전자가 합류에어려움을 겪어 전략 운영에 한계가 존재하나, 자율협력주행차는 통신기능을 활용하여 고도화된 교통관리전략의 운영이 가능하다. 이에 본 연구는 자율협력주행차 환경에서 동적합류제어와 차로변경제어를 통합한 교통관리전략을 개발하였다. 통합제어전략은 공사구간 상류의 점유율을 기준으로 조기합류 또는 지연합류를 운영하며, 비공사차로의 차로별 교통량을 균형화하기 위해 차로를 변경할 차량수를 결정한다. 미시교통시뮬레이션에 자율협력주행차와 전략을 구현하고 분석한 결과 누적 통과교통량, 공사구간 상류의 평균속도 및 네트워크 평균통행시간이 개선되어 도로 운영성이 향상된 것을 확인하였다.

Abstract

A bottleneck and congestion occur when a freeway is closed due to maintenance and construction activities on the freeway. Although various traffic managements have been developed to improve the traffic efficiency at freeway work zones, such as merge control, there is a limit to those controls with human drivers. On the other hand, the wireless communication of connected and automated vehicles (CAVs) enables the operation of advanced traffic management. This study developed a traffic control strategy that integrates Dynamic Merge Control (DMC) and Lane Change Control (LCC) in a CAV environment. DMC operates as an either early or late merge based on the occupancy rate of upstream of the work zone. The LCC algorithm determines the number of vehicles that need to change their lane to balance the traffic volume on open lanes. The simulation results showed that integrated control improves the cumulative vehicle count, average speed upstream, and average network travel time.

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