Car accident in synchronized traffic flow: A stochastic cellular automaton model

A. Karakhi, A. Laarej, A. Khallouk, N. Lakouari and H. Ez-Zahraouy
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A. Karakhi: Laboratoire de Matière Condensée et Sciences Interdisciplinaries (LaMCScl), Faculty of Sciences, Mohammed V University of Rabat P. O. Box 1014, Morocco
A. Laarej: Laboratoire de Matière Condensée et Sciences Interdisciplinaries (LaMCScl), Faculty of Sciences, Mohammed V University of Rabat P. O. Box 1014, Morocco
A. Khallouk: Laboratoire de Matière Condensée et Sciences Interdisciplinaries (LaMCScl), Faculty of Sciences, Mohammed V University of Rabat P. O. Box 1014, Morocco
N. Lakouari: #x2020;Cátedra CONACyT, Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Tonantzintla, Puebla 72840, Mexico‡Computer Science Department, Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Tonantzintla, Puebla 72840, Mexico
H. Ez-Zahraouy: Laboratoire de Matière Condensée et Sciences Interdisciplinaries (LaMCScl), Faculty of Sciences, Mohammed V University of Rabat P. O. Box 1014, Morocco

International Journal of Modern Physics C (IJMPC), 2021, vol. 32, issue 01, 1-12

Abstract: In this paper, we study the probability of car accidents in the modified Nagel–Schreckenberg (mNaSch) under the periodic boundary condition. In order to understand the quality of interaction between vehicles in each phase of the mNaSch, the velocity correlation coefficients were investigated. The effect of the evacuation of damaged vehicles was also studied. The fundamental diagram of the system is constructed in both cases with and without the evacuation. We found that the synchronized phases in the mNaSch are manifested into two aspects. In the first phase, the velocity correlation coefficients are zero where all vehicles move at the same speed. Hence, in the other phase, the speed of vehicles shows a synchronization as the form of clusters of moving vehicles where two speeds predominate simultaneously and the velocity correlation coefficients are higher. In addition, the car accidents in the modified mNaSch depend strongly on the initial configuration especially, if we consider those car accidents really happening in the system. The evacuation of damaged vehicles enhances the traffic situation and qualitatively changes the traffic phases in the mNaSch.

Keywords: mNaSch; car accidents; traffic flow; cellular automaton; synchronized flow (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S012918312150011X

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