PURPOSES: This study dealt with traffic accidents occurring within roundabouts. The objective of this study was to analyze safety effect by introduction of roundabouts.
METHODS: In pursuing the above, traffic accident data on roundabouts are collected and compared. For the analysis, collected data were separated as all intersection points, turning lane accident, approach lane accident by geometric design.
RESULTS : Through the study results, it was found that the total accidents decreased by 55 accidents/2 year with safety effect of roundabouts. Also the result shows that accidents by point of two-lane roundabout at turning lane(0.26) and approach lane(0.27) is risky than total accidents by point(0.09). Moreover, accidents by point shows high value as diameter of a roundabout is bigger.
CONCLUSIONS: When a roundabout is introduced at the intersections there are safety effects by reduction of traffic accidents.

• 이동민(서울시립대학교 교통공학과 조교수) | Lee, Dong Min 교신저자
• 전진우(서울시립대학교 교통공학과 박사과정) | Jeon, Jin Woo
• 박용진(서울시립대학교 교통공학과 석사과정) | Park, Yong Jin