Traffic flow study for a modified car-following model based on dynamical safety headway

Dou He (), Wen-Xin Sun (), Wen-Xiu Hu (), Xin-Yue Guo () and Geng Zhang
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Dou He: College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China
Wen-Xin Sun: College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China
Wen-Xiu Hu: College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China
Xin-Yue Guo: College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China
Geng Zhang: College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China

International Journal of Modern Physics C (IJMPC), 2024, vol. 35, issue 03, 1-14

Abstract: A modified optimal velocity with dynamical safety headway is introduced based on the optimal velocity car-following model. The dynamical safety headway relates to vehicle’s velocity compared to the constant safety headway. To study the influence of dynamical safety headway on the car-following performance, theoretical analysis and numerical simulation of the optimal velocity car-following model with dynamical safety headway are carried out. With the stability analysis method in control theory, a linear stability condition is obtained for the new model. In addition, the car-following performances of traffic flow evolution rules, traffic capacity properties and vehicle starting features of the new model are exhibited through numerical simulation. The results show that the dynamical safety headway is more efficient than the constant safety headway in improving traffic stability, enhancing traffic capacity and shortening the vehicle starting time in the car-following process. It concludes that the dynamical safety headway is a better strategy compared to constant safety headway in real car-following control.

Keywords: Car-following model; traffic flow; dynamical safety headway (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0129183124500323

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