| Citation: | LI Honggang, Gaohaer·DAWULI, WANG Shuai, et al. An improved car-following model considering effect of pedestrians of adjacent lane on traffic flow[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(2): 422-428. doi: 10.13700/j.bh.1001-5965.2018.0662(in Chinese)
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This paper proposes an improved vehicle dynamics model based on the current situation of mixed-pedestrian-vehicle driving in real life. The model considered the influence of pedestrians, bicycles, etc. on the adjacent lanes or in lateral directions on the driving behavior of the main road vehicles. Based on the classical optimal velocity model, this paper modelled the actual problem and introduced the lateral distance and longitudinal distance between the main road vehicle and the pedestrian as parameters into the optimal velocity model, and expanded to obtain the improved model. In order to verify the stability and effectiveness of the model, this paper used the linear stability theory to derive the stability and non-stable conditions of the model, draw a neutral stability curve, and visually describe the size of the traffic flow stability area. It is shown that the improved model considering the lateral pedestrian interference factor is more stable than the traditional car-following model considering only the single-lane vehicle factor, and the steady-state region caused by the change of different parameters also changes. This paper adopted a more realistic optimization of the velocity equation and described the driving behavior of the vehicle through simulation experiments. The simulation experiment lists two kinds of practical scenarios:when pedestrians are scarce and when pedestrians are more. The velocity-time curve of the vehicle and the space(distance)-time curve of the vehicle were plotted separately. The experimental results show that the lateral pedestrians do interfere with the normal driving of the vehicle; in different scenarios, the number of pedestrians will also affect the driving behavior of the vehicle to varying degrees.
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