In order to explore the following behavior characteristics of drivers when driving in the merging area of Freeway, which are influenced by the regional traffic flow characteristics, such as acceleration and deceleration of other vehicles, frequent lane change, ramp vehicles merging into the main road and so on, and the behavior difference due to different interferences. Based on the vehicle trajectory data processed in the video taken in the freeway merging area, 11 characteristic parameters representing the car-following state are extracted. The behavior characteristics of 48 following drivers are analyzed by PSO-KM algorithm from three aspects of speed stability, following behavior tendency and lateral position stability. The differences of following behaviors of drivers in each lane and their causes are analyzed. Enter the analysis. It is of great significance to understand the inherent relationship among the behavior characteristics of drivers, the special traffic flow characteristics and the traffic safety risks, and to carry out further research on the accident risk assessment of the merging area of freeway.

CICTP