고속도로 단차로 하이패스차로 용량 검토에 관한 연구 : 부트스트랩 기법 활용 중심으로
A Study on the Capacity Review of One-lane Hi-pass Lanes on Highways : Focusing on Using Bootstrapping Techniques
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초록
현재 고속도로 설계지침에서는 단차로 하이패스차로의 용량을 본선형 영업소는 2,000대/시, 나들목 영업소는 1,700대/시로 제시하고 있다. 그리나 2010년도 초반에 수행되었던 연구에서는본선형 영업소는 1,476대/시/차로~1,665대/시/차로, 나들목 영업소는 1,443대/시/차로 정도로 제시하였다. 이에 본 연구는 현재 제시되고 있는 고속도로 단차로 하이패스차로의 용량의 타당성을 검토하였다. 단차로 하이패스 갠트리에서 수집되는 2021년도 개별차량 통과 자료를 기반으로 속도-교통량 관계 그래프와 차두시간을 활용하여 용량을 산정하고 비교하였다. 또한 차두시간 활용에 있어 부트스트랩 기법을 도입하여 수집데이터의 새로운 가공 방안에 대해 검토하였다. 분석 결과 단차로 하이패스 용량은 나들목 영업소는 1,700대/시/차로로 제시할 수 있었으며, 본선형 영업소는 적어도 1,700대/시/차로 이상으로 추정할 수 있었다. 또한 차두시간 자료 이용 시 부트스트랩 기법을 활용하면 관측용량과 유사한 추정용량을 제시할 수 있었다.
Abstract
In the present highway design guidelines suggest that the capacity of one-lane hi-pass lanes is 2,000 veh/h for mainline toll plaza and 1,700 veh/h for interchange toll plaza. However, in a study conducted in early 2010, capacity of the mainline toll plaza was presented with 1,476 veh/h/ln to 1,665 veh/h/ln, and capacity of the interchange toll plaza was presented as 1,443 veh/h/ln. Accordingly, this study examined the feasibility of the capacity of the currently proposed highway one-lane hi-pass lane. Based on the 2021 individual vehicle passing data collected from the one-lane hi-pass gantry, the speed-traffic volume relationship graph and headway were used to calculate and compare capacity. In addition, the bootstrapping technique was introduced to utilize the headway and new processing methods for collected data were reviewed. As a result of the analysis, the one-lane hi-pass capacity could be estimated at 1,700 veh/h/ln for the interchange toll plaza, and at least 1,700 veh/h/ln for the mainline toll plaza. In addition, by using the bootstrap technique when using headway data, it was possible to present an estimated capacity similar to the observed capacity.
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