Conflicts between cyclists and motor vehicles at a signalized intersection were characterized using an objective conflict indicator; Post- Encroachment Time (PET). Traffic video data was collected for a total of 28 hours over three days at a signalized intersection in downtown Ottawa. PET was calculated using two analysis methods, manual and automated, for two types of conflicts, right-hook and left-turn. The total number of conflict events analyzed in this study was 119. The results of the conflict analysis show that the average absolute error between the manual and automated PET was 0.23 sec and the standard deviation was 0.29 sec. The results also showed that the average PET using the manual analysis was 1.81 sec with minimum PET 0.43 sec. While the average PET using the automated analysis was 1.73 sec. with minimum PET 0.13 sec. According to the testing and analysis conducted in this paper, the absolute error reflects the efficiency, accuracy and reliability of the tracker system application.
展开▼
