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The Korea Institute of Intelligent Transport Systems (한국ITS학회)
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A Study on Algorithm and Operation Technique for Dynamic Hard Shoulder Running System on Freeway

고속도로 동적 갓길차로제 알고리즘과 운영기법 연구

  • Nam Sik Moon (Dept. of Urban Information Eng., Anyang Univ.) ;
  • Eon kyo Shin (Dept. of Urban Information Eng., Anyang Univ.) ;
  • Ju hyun Kim (Dept. of Urban Information Eng., Anyang Univ.)
  • 문남식 (안양대학교 도시정보공학과) ;
  • 신언교 (안양대학교 도시정보공학과) ;
  • 김주현 (안양대학교 도시정보공학과)
  • Received : 2024.07.01
  • Accepted : 2024.08.13
  • Published : 2024.08.31
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Abstract

This study, developed a dynamic hard shoulder running(HSR) algorithm that includes ending speed and minimum operation time in addition to the starting speed for HSR, and presented an operation plan. The first stage of the algorithm was red, which means vehicles are prohibited from HSR. The second stage is red/amber, in which drivers are notified of HSR, and operators are given time to check whether there is any obstacle to HSR. Stage 3 is green, which vehicles are permitted for HSR. Stage 4 is amber, in which a signal is given to drivers that the end of HSR is imminent. In addition, a minimum time is applied to green and red, but if congestion is severe, red is terminated early to prevent congestion from worsening. The upstream and downstream traffic flow is managed stably through main line ramp metering and lane number matching. The operating standard speed reflects the characteristics of vehicles and drivers, and based on simulation results, 7090 was selected as the optimal operating standard speed considering traffic flow and safety aspects. Therefore it is desirable to apply the travel time divided by the minimum speed of the HSR link as the minimum operating time in order to ensure continuity of traffic flow

본 연구에서는 갓길차로제 운영시작속도 외에 종료속도와 최소운영시간 등을 포함하는 동적 갓길차로제 알고리즘을 개발하고 운영방안을 제시하였다. 알고리즘은 1단계는 red로 갓길차로의 차량통행이 금지된다. 2단계는 red amber로 운전자들에게는 갓길차로 통행을 예고해주고 운영자에게는 갓길차로에 차량통행을 방해할 요소가 있는지를 점검할 시간을 주게 된다. 3단계는 green으로 갓길차로의 차량통행이 허용되는 단계이다. 4단계는 amber로 차량통행은 허용되면서 갓길차로 종료가 임박했다는 신호를 운전자들에게 주게 된다. 그리고 green 과 red에는 최소운영시간을 적용하되 red의 경우에는 정체가 심한 경우 조기 종료되도록 하여 정체가 악화되지 않도록 하고 본선램프미터링과 차로수 조화로 상·하류부 교통류를 안정적으로 관리되도록 하였다. 운영기준속도는 고속도로를 이용하는 차량과 운전자 특성을 반영하고 시뮬레이션한 결과를 토대로 소통측면과 안전측면을 고려하여 7090을 최적 운영기준속도로 선정하였다. 최소운영시간은 갓길차로가 운영되는 개별 링크거리를 최저속도로 나눈 통행시간을 제안하여 통행의 연속성이 확보되도록 하였다.

Keywords

References

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