Exploring the Impact of Channelized Islands on the Driving Behavior of Right-Turning Vehicles at Intersections

As a key node where traffic conflicts are prone to occur on roads, it is of great significance to explore the influencing factors of vehicle driving behavior at intersections. However, the mechanism by which channelization islands affect the driving behavior of right-turning vehicles at intersections is not clear yet. In this study, we recruited 20 drivers and explored the impact of geometric factors on channelization islands on the average deviation and speed of right-turning vehicles through driving simulation experiments, including channelization island type, offset distance, end circular curve radius, length of two straight edges of channelization island, and the angle corresponding to the third curved side. The main influential factors for the average deviation and speed were selected through Spearman correlation test and stepwise regression method to establish the average deviation model of trajectory and the average velocity model of trajectories. The results could provide theoretical support for more accurate intersection simulation and right-turn channelization design.