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Chin. Phys. B, 2014, Vol. 23(5): 050701    DOI: 10.1088/1674-1056/23/5/050701
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Cellular automata model for traffic flow with safe driving conditions

María Elena Lárraga, Luis Alvarez-Icaza
Instituto de Ingeniería, Universidad Nacional Autónoma de México, 04510, Coyoacán D. F., México
Abstract  In this paper, a recently introduced cellular automata (CA) model is used for a statistical analysis of the inner microscopic structure of synchronized traffic flow. The analysis focuses on the formation and dissolution of clusters or platoons of vehicles, as the mechanism that causes the presence of this synchronized traffic state with a high flow. This platoon formation is one of the most interesting phenomena observed in traffic flows and plays an important role both in manual and automated highway systems (AHS). Simulation results, obtained from a single-lane system under periodic boundary conditions indicate that in the density region where the synchronized state is observed, most vehicles travel together in platoons with approximately the same speed and small spatial distances. The examination of velocity variations and individual vehicle gaps shows that the flow corresponding to the synchronized state is stable, safe and highly correlated. Moreover, results indicate that the observed platoon formation in real traffic is reproduced in simulations by the relation between vehicle headway and velocity that is embedded in the dynamics definition of the CA model.
Keywords:  traffic flow models      synchronized traffic      cellular automata      platoons formation  
Received:  10 September 2013      Revised:  20 December 2013      Accepted manuscript online: 
PACS:  07.05.Tp (Computer modeling and simulation)  
  45.70.Vn (Granular models of complex systems; traffic flow)  
  89.40.Bb (Land transportation)  
Fund: Project supported by the DGAPA, UNAM (Grant No. IN104913).
Corresponding Authors:  María Elena Lárraga     E-mail:  mlarragar@iingen.unam.mx
About author:  07.05.Tp; 45.70.Vn; 89.40.Bb

Cite this article: 

María Elena Lárraga, Luis Alvarez-Icaza Cellular automata model for traffic flow with safe driving conditions 2014 Chin. Phys. B 23 050701

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