Characteristics of Vehicular Traffic Flow at a Roundabout

Details Characteristics of Vehicular Traffic Flow at a Roundabout Characteristics of Vehicular Traffic Flow at a Roundabout

2003-09-24

arxiv.org/abs/cond-mat/0309560v2

Phys. Rev. E 70, 046132 (2004)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 17 eps figures. arXiv admin note: text overlap with arXiv:cond-mat/0401078

Scientific paper

10.1103/PhysRevE.70.046132

We construct a stochastic cellular automata model for the description of vehicular traffic at a roundabout designed at the intersection of two perpendicular streets. The vehicular traffic is controlled by a self-organized scheme in which traffic lights are absent. This controlling method incorporates a yield-at-entry strategy for the approaching vehicles to the circulating traffic flow in the roundabout. Vehicular dynamics is simulated within the framework of the probabilistic cellular automata and the delay experienced by the traffic at each individual street is evaluated for specified time intervals. We discuss the impact of the geometrical properties of the roundabout on the total delay. We compare our results with traffic-light signalisation schemes, and obtain the critical traffic volume over which the intersection is optimally controlled through traffic light signalisation schemes.

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