2023 Volume 79 Issue 20 Article ID: 23-20031
The capacity of a left-turn lane with pedestrians is calculated using the probability of being able to use the pedestrian gap (i.e., the passing probability of left-turning vehicles). However, this passing probability was established about 40 years ago and has not been changed since then. Furthermore, the specified value is calculated only for pedestrians and does not take bicycles into account, but it is expected to be lower than that for pedestrians only when bicycles are present. Therefore, in this study, pedestrians, bicycles, and left-turning vehicles were observed at several signalized intersections with left-turning lanes. The passing probability was calculated for pedestrian and bicycle traffic, intersection structure, and traffic operation, and the relationship between these factors was analyzed. The results showed that the passing probability is significantly lower when bicycles are mixed with pedestrians, and also affected by the intersection structure and traffic operation.
