Cellular automata model simulating traffic car accidents in the on-ramp system

Abstract

Laboratoire de Magn etisme et de Physique des Hautes Energies (URAC 12), D epartement de physique B.P. 1014, Facult e des sciences Universit e Mohammed V Agdal, Rabat, MoroccoIn this paper, using Nagel-Schreckenberg model we study the on-ramp system under the expanded open boundary condition. The phase diagram of the two-lane on-ramp system is computed. It is found that the expanded left boundary insertion strategy enhances the°ow in the on-ramp lane. Furthermore, we have studied the probability of the occurrence of car accidents. We distinguish two types of car accidents: the accident at the on-ramp site ðP rc Þ and the rearend accident in the main road ðP ac Þ. It is shown that car accidents at the on-ramp site are more likely to occur when tra±c is free on road A. However, the rear-end accidents begin to occur above a critical injecting rate c1 . The in°uence of the on-ramp length ðL B Þ and position ðx C 0 Þ on the car accidents probabilities is studied. We found that large L B or x C 0 causes an important decrease of the probability P rc . However, only large x C 0 provokes an increase of the probability P ac . The e®ect of the stochastic randomization is also computed.

Simulation study of interference of crossings pedestrian and vehicle traffic at a single lane roundabout

“…3(c)), the circulating lane, the entry lanes and the part before the crosswalk in the exit lanes are jam-packed with 9 vehicles. Here, no further vehicles can enter and exit to/from the system owing to the high value of arrival probability P cr , 10 in other word, the crosswalk is more often occupied by crossings pedestrian (i.e. crossing belts) which decreases the system 11 capacity.…”

“…Many 3 observed traffic phenomenon have been successfully described by computer simulation with various models, e.g. car 4 following, Fluid-dynamical method, and Cellular automaton (CA) [1][2][3][4][5][6][7][8][9][10][11][12][13]. This later has been adopted extremely and well 5 received as a good tool to study the traffic and/or pedestrian dynamics [8][9][10][11][12]14].…”

“…For this reason, many studies have 7 examined the pedestrian flow and its effect on vehicular traffic [15][16][17][18][19][20][21][22][23][24]. Feng et al [15] proposed a cellular automata model 8 to evaluate walkers' facilities before its implementation, Zhuang and Wu [16] developed a model of pedestrian crossing 9 paths at unmarked roadways to better understand pedestrian behaviors, Yannis et al [17] studied walkers' gap acceptance 10 for mid-block road crossing in urban areas, Xie et al [18] investigated the characteristics of the traffic flow on a road with 11 a signalized crosswalk in the framework of CA model, Zhang et al [19] proposed a cellular automata model to study the Furthermore, we analyze how the location of the crosswalk and the driver cooperative behavior can influence the dynamic 3 characteristics of pedestrian and vehicle flux. The paper is organized as follows.…”

Effective hybrid link-adding strategy to enhance network transport efficiency for scale-free networks

“…It will be di±cult to recover large systems from congested state to free-°ow state. [12][13][14] Therefore, how to enhance the transport capacity of networks to alleviate the congestion becomes a hot topic in communication network science. Transport capacity considerably relies on the routing strategies, network resource and underlying topologies.…”

Simulation of root forms using cellular automata model

“…Cellular automata models have significantly contributed to urban growth modeling [2][3][4][5]. The model can also be applied for simulating frozen soil processes, traffic car accidents in the on-ramp system, abrasive water jet cutting, cancer tumors, electrical tree propagation, groundwater, surface flows in large plains, anisotropic etching of complex micro electro mechanical systems [6][7][8][9][10][11][12][13]. In accordance with the educational purposes, a root form simulation can be applied in a science instruction at an elementary school.…”