PURPOSES : This study was conducted to analyze the driving width of the vehicle body and off-track width of front-rear tires when a large vehicle or an articulated bus passes through a roundabout.
METHODS : The driving width was measured using two methods considering the off-tracking tire and the size of the vehicle body. The test conditions of the roundabout were considered as follows: number of entry/exit sections (three-legs roundabout and four-legs roundabout), number of lanes (one lane and two lanes), driving speed (10 km/h, 20 km/h, and 30 km/h), driving trajectory (centerline and maneuver), and driving path (right turn, straight, left turn, and U-turn). The driving trajectories of large buses or articulated buses were analyzed using a road design simulation tool (AutoTURN Pro).
RESULTS : Consequently, it was observed that the driving width calculated using the off-track width of the front and rear tires was lower than that analyzed for the vehicle body. The width was smaller in the case of driving in the one-lane roundabout than that in the two-lane roundabout. In particular, it was analyzed that the situation in which the turning path invades the lane appeared in left-turn (East → South) and U-turn (East → East) situations. The width was narrower in the case of driving in the one-lane roundabout than that in the two-lane roundabout.
CONCLUSIONS : The study results are expected to be applied for designing roads when large buses or articulated buses are selected as design vehicles.

ABSTRACT
1. 서론
2. 분석 개요
    2.1. 회전교차로
    2.2. 시뮬레이션 툴(AutoTurn Pro)
    2.3. 주행 궤적 및 주행 경로
    2.4. 기존 연구와의 차별성
3. 분석 결과
    3.1. 1차로형 회전교차로(굴절 버스)
    3.2. 2차로형 회전교차로(대형 버스, 굴절 버스)
4. 결론 및 향후 연구과제
REFERENCES

• 박재홍(한국건설기술연구원 도로교통연구본부) | Park Jaehong (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 노민형(한국건설기술연구원 도로교통연구본부) | Noh Min Hyung (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 윤천주(한국건설기술연구원 도로교통연구본부) | Yoon Chunjoo (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 윤덕근(한국건설기술연구원 도로교통연구본부) | Yun Duk Geun (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology)
• 성정곤(한국건설기술연구원 도로교통연구본부) | Sung Jung Gon (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology) 교신저자