PURPOSES : In this study, the installation standards for micro-roundabouts at the intersection of local streets with two entering lanes of a 3.0 m lane width were developed.
METHODS : The inscribed circle diameter where a design standard vehicle could turn around safely based on the lane width and speed was analyzed using AutoTURN software. A total of 864 analysis scenarios for different entering volume and left-turning ratio (10%, 20%, 30%, and 40%), intersection type (three-way and four-way), heavy vehicle ratio (0%, 5%, and 10%), and circle lane turning speed (10, 15, and 20 km/h) conditions were established and evaluated. VISSIM Micro-Simulation was used to estimate the entering volume for microroundabouts with LOS C. RESULTS : The results showed that the estimated entering volumes of the three-way and four-way micro-roundabouts with LOS C were 300~400 and 200~400 vehicle/hour/lane, respectively. CONCLUSIONS : It is demonstrated that the standard volume of entering vehicles for micro-roundabouts is approximately 200 vehicle/ hour/lane, considering the number of approach lanes, designed speed of circulating lanes, left turn ratio, and heavy vehicle ratio.

ABSTRACT
1. 서론
    1.1. 연구의 배경 및 목적
    1.2. 연구범위 및 방법
2. 이론적 고찰
    2.1. 초소형 회전교차로 정의
    2.2. 국내·외 회전교차로 설계기준 검토
    2.3. 선행연구고찰
3. 초소형 회전교차로 회전반경 검토
    3.1. 회전반경 분석개요
    3.2. 회전반경 분석결과
4. 초소형 회전교차로 용량분석
    4.1. 분석 시나리오 설정
    4.2. Simulation 모형 구축
    4.3. 회전교차로 평가척도
    4.4. 용량분석 결과
    4.5. 초소형 회전교차로 전환기준 교통량
5. 결론 및 향후 연구과제
    5.1. 결론
    5.2. 향후 연구과제
REFERENCES

• 이솔(국립공주대학교 건설환경공학과) | Lee Sol
• 김영춘(한국교통연구원 도로교통본부) | Kim Young-Chun
• 안우영(국립공주대학교 도시융합시스템공학과) | Ahn Woo-Young 교신저자
• 조한선(한국교통연구원 도로교통본부) | Cho Han-Seon
• 이명한(한국교통안전공단 교통안전본부 교통안전처) | Lee Myung-Han