Abstract
Vehicle lane changing in a nearly saturated fast road segment tends to increase the probability of traffic accidents in the road segment and reduce the speed of the rear vehicles in the target lane. To better analyze the relationship between the target vehicle and the front and rear vehicles in the target lane, this study focuses on the insertion angle of the target vehicle as the research object. Moreover, this study considers influencing factors, such as the longitudinal distance, transverse distance, and speed of the front and rear vehicles in the target lane. This study also adopts aerial photography to capture the flow of the main road of the Xi’an South Second Ring Road, Chang’an University segment. Information regarding the vehicle captured on video, including the speed, insertion angle, and coordinates, is extracted using the software Tracker. The coordinates correlation and speed correlation are analyzed using the software SPSS 2.0. K-means cluster analysis is applied to cluster the insertion angle of the target vehicle, and the insertion speed of the target vehicle. Of the total samples, 89.47% were inserted into the target lane at around 23° or below. The PC-Crash software was used to verify that the collision consequences gradually increased with the increase in collision angle. Therefore, when the insertion angle of the vehicle changes to lower than 23°, the overall road traffic condition is optimal, and no large losses are incurred.
Highlights
Lane changing is one of the most common vehicle driving behaviors in fast road segments
When the target vehicle is inserted into the target lane, the change in the distance between the target vehicle and the front vehicle and that between the front vehicle and the rear vehicle in the X- and Y-axes of the target lane is analyzed
When the target vehicle is inserted into the target lane, the change in thSuestdaiinsatbailnitcye20b2e0t,w12e, 1e0n13the target vehicle and the front vehicle and that between the front vehicle9aonfd17 the rear vehicle in the X- and Y-axes of the target lane is analyzed
Summary
Lane changing is one of the most common vehicle driving behaviors in fast road segments. A study on vehicle lane change conducted by Shuan et al [3] showed that traffic accidents caused by direct or indirect lane changes comprised 15.8% of total traffic accidents. Lee et al [4] indicated that collision accidents caused by vehicle lane changes comprised 4%–10% of total accidents. Most studies have focused on lane changing in a free-flow state road segment or intersection, but few have reported on the angle of insertion of the lane-changing vehicle under high-traffic density conditions. It is important to analyze the angle of insertion of the lane-changing vehicle into the target lane when the traffic load of the fast road segment is in the 0.85–0.95 range
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