The hamburger roundabout allows traffic on major roads to proceed directly during the green phase without entering the circulating roadway, thereby reducing travel distance. Compared to conventional signalized intersections, it operates with shorter cycle lengths and simpler phasing, which can reduce unnecessary vehicle delays and improve traffic efficiency. Although the Korean Roundabout Design Guidelines (2022) define this configuration as a cut-through roundabout, no such installations have been implemented in Korea, and research that simultaneously considers vehicular and pedestrian movements remains limited. Therefore, this study analyzed the operational effectiveness of a hamburger roundabout considering both vehicles and pedestrians. The optimal signal operation was determined using VISTRO software by incorporating the minimum pedestrian signal timing requirements, and the operational effects of pedestrian signal operation at crosswalks were evaluated using VISSIM. The results showed that the appropriate intersection type varied depending on the proportion of left-turning traffic. When the left-turn proportion was 20% or less, the hamburger roundabout produced a lower average delay than the signalized intersection at total entering volumes of 1,600–2,000 veh/h, with a maximum reduction of 19.74 s/veh. By contrast, when the left-turn proportion was 30%, the delay difference between the two intersection types increased as the total entering volume increased, indicating that the signalized intersection was a more effective operational alternative. When the hamburger roundabout was evaluated independently, the traffic operations remained acceptable up to a total entering volume of 4,000 veh/h when the left-turn proportion was 20% or less. However, when the left-turn proportion was 30% or higher, shorter delays were observed under scenarios with more balanced left- and right-turn proportions than under scenarios dominated by through-traffic. Overall, the hamburger roundabout reduced the average control delay by approximately 20% compared with signalized intersections at total entering volumes of 2,000 veh/h or less. When the left-turn proportion was 20% or less, the average control delay corresponded to level of service (LOS) C, indicating that the hamburger roundabout can serve as an effective operational alternative. When the left-turn proportion was 30% or higher, the hamburger roundabout was found to be more favorable under conditions of balanced left- and right-turn traffic than under conditions dominated by through-traffic.

ABSTRACT
1. 서론
    1.1. 연구의 배경 및 목적
    1.2. 연구의 범위 및 방법
2. 이론적 고찰
3. 선행 연구 검토
    3.1. 회전교차로 관련 연구
    3.2. 신호운영 및 보행자 관련 연구
4. 연구 방법론
    4.1. 분석 시나리오 설정
    4.2. 분석 네트워크 구축
    4.3. 분석 신호체계 구축
5. 분석결과
    5.1. 신호교차로 분석결과
    5.2. 햄버거형 회전교차로 분석결과
    5.3. 통계적 검증
6. 결론
REFERENCES

• 박지수(국립공주대학교 도시융합시스템공학과 석사과정) | Park Ji-Su
• 안우영(국립공주대학교 도시·교통공학과 교수) | Ahn Woo-Young Corresponding author
• 강미혜(국립공주대학교 도시융합시스템공학과 박사과정) | Kang Mi-Hye