KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Improving Two-way Road Functionality by Using Shoulder

길어깨를 활용한 2차로 도로 기능개선 방안 연구

  • 최기주 (아주대학교 교통시스템공학과) ;
  • 심상우 (아주대학교 교통연구센터)
  • Received : 2012.01.16
  • Accepted : 2013.04.11
  • Published : 2013.07.30
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Abstract

The purpose of this study is deriving proper plan which is improving functionality of three-way intersection in two-way road by using shoulder. Alternatives of this study were considered as installation of yield lane and application of TWLTLs (Two-Way Left-Turn Lanes). Case studies to utilize alternatives were limited to national and local roadways which is wider than 11 meters due to be required 3 lanes. Under various traffic conditions such as traffic volume of each direction and left-turn, alternatives were analyzed by simulation. As a results, application of TWLTLs was better than installation of yield lane in terms of improving rate (8.0% vs. 3.7%). Application of TWLTLs is supposed to better alternative, however enough driver education is required to improving safety because it is different with existing driving pattern and/or behaviors. Some limitations and future research agenda have also been discussed by on-site inspections.

본 연구의 목적은 길어깨를 활용하여 2차로도로 3지 비신호 교차로의 기능을 개선할 수 있는 대안을 도출하는 것이다. 본 연구에서는 임시양보차로 설치와 Two-Way Left-Turn Lanes (TWLTLs) 방식을 개선대안으로 적용하였다. 개선대안을 적용하기 위해서는 3개 차로(2차로+양보 및 대기차로)가 필요하며, 이를 만족시키는 도로의 최소폭원은 11 m이므로 보조간선도로급인 국도와 지방도를 적용대상으로 선정하였다. 개선대안 비교를 위해 다양한 교통조건(직진 교통량, 반대차선교통량, 좌회전교통량)하에서 시뮬레이션을 분석을 수행한 결과 임시양보차로를 설치한 경우(개선율 3.7%)에 비해 TWLTLs 방식(개선율 8.0%)이 더 좋게 나타났다. 이러한 결과를 볼 때 TWLTLs 방식을 적용한 방안이 더 효과적이나 이 방식은 충분한 회전반경이 마련되지 않아 u-turn 시 반대차선의 차량과 상충이 발생할 수 있으므로 안전성 측면에서 많은 문제가 발생할 것으로 예상된다. 따라서 이를 적용하기 위해서는 충분한 교육과 대응방안 수립 등 더 많은 검토가 필요할 것으로 사료된다.

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