PURPOSES: The objective of this study was to analyze variations in the vehicle driving behavior characteristics on signalized intersections according to the use of traffic enforcement camera (red light camera).
METHODS: In order to analyze the driving behavior characteristics on signalized intersections when red light camera are installed, the target sites for investigation were selected depending on whether the red light camera is installed and accident rates increased after the installation. In particular, to analyze the characteristics of dilemma zones in signalized intersections, approach speed and deceleration speed of 3 type vehicles (passing vehicles during a yellow light, stopping at a yellow light, passing vehicles during a green light) were examined. Based on these data, the starting point, ending point, and distance of the dilemma zones were calculated. Also, the locations of increased traffic accidents and decreased accidents after the installation of the equipment were distinguished when analyzing the traffic accident characteristics.
RESULTS : Analysis results revealed that there was a tendency for the dilemma zone distance to decrease after the installation of equipment(red light camera) in most sites. This tendency was found to be due to the decrease in the approaching speed of vehicles at intersections after the installation of equipment, resulting in the starting and ending points of dilemma zone to become closer to the stop line. Moreover, analysis showed that the number of traffic accidents decreased for most intersections after the installation of equipment and safety of the intersections increased somewhat.
CONCLUSIONS : In general, installation of equipment(red light camera) caused the intersections approaching speed and dilemma zone distance to decrease. Decision-making is difficult for drivers in the dilemma zone, so the decrease in the dilemma zone distance implies an improvement in traffic safety. Furthermore, the number of accidents within intersections significantly decreased after the equipment was installed, leading to the conclusion that installation of the equipment affected the decrease in traffic accidents.

1. 서론
  1.1. 연구의 배경 및 목적
  1.2. 연구의 내용
 2. 이론적 고찰
  2.1. 황색신호시간
  2.2. 딜레마존(Dilemma zone)
  2.3. 무인교통단속장비
 3. 연구방법
  3.1. 분석개요
  3.2. 조사개요
 4. 분석결과
 5. 결론 및 향후 연구과제
 REFERENCES

• 한명주(창원시정연구원 연구위원) | Han Myungjoo
• 이숭봉(서울대학교 환경대학원 박사수료) | Lee Soongbong 교신저자
• 김혜원(서울연구원 연구원) | Kim Hyeweon
• 이영인(서울대학교 환경대학원 교수) | Lee YoungIhn
• 김상옥(삼성교통안전문화연구소 수석연구원) | Kim Sangok