본선미터링과 램프미터링을 이용한 고속도로 통합교통관리 전략
Integrated Traffic Management Strategy on Expressways Using Mainline Metering and Ramp Metering
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본 연구에서는 램프미터링과 요금소 본선미터링을 이용한 고속도로 통합교통관리 전략을 제시하였다. 램프와 본선의통합 미터링을 위해 FREQ에서 램프미터링 진입허용 교통량의 최적화에 사용되는 Demand-Capacity 모형을 수정하여최적 신호시간 산정모형을 제시하였다. 본 모형은 구간별 통과교통량을 최대화하는데 목표가 있으며, 본선 요금소 및 램프의 미터링 신호시간을 결정할 수 있다. 서울외곽순환선의 김포요금소~시흥요금소 구간을 대상으로 PARAMICS와 API를 이용하여 시뮬레이션 효과분석을 시행하였다. 시뮬레이션 분석결과, 본선미터링을 통해 램프미터링 단독 운영 대비 본선을 소통원활 상태의 속도로 유지할 수 있었으며, 정체구간에서 본선의 통과교통량이 14% 개선된 결과를 나타내었다. 또한 요금소에서의 신호운영으로 400m의 대기행렬이 발생되나, 정체의 분산으로 인해 본선과 램프 모두에서 보다효율적 교통운영이 가능함을 확인하였다.
Abstract
This research proposed integrated expressway traffic management strategy using ramp metering and toll mainline metering. This research suggested a traffic signal optimization model for integrated operation of ramp and mainline metering based on Demand-Capacity Model that is used to optimize allowable input volume for ramp metering in FREQ model. The objective function of this model is sectional throughput volume maximization, and this model can calculate optimal signal timings for mainline metering and ramp metering. This study conducted an effectiveness analysis of integrated metering strategy using PARAMICS and its API. It targeted Seoul’s Outer Ring Expressway between Gimpo and Siheung toll gate. As a simulation result, integrated operation of mainline and ramp metering provided more smooth traffic flow, and throughput volume of mainline increased to 14% in congested section. In addition, a queue of 400 meter was formed at metering point of toll gate. This research checked that integrated traffic management strategy facilitates more efficient traffic operation of mainline and ramp from diffused traffic congestion.
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