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J. Phys. Soc. Jpn. 63 (1994) pp. 3609-3618  |Next Article|  |Table of Contents|
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Dynamical Phase Transition in One Dimensional Traffic Flow Model with Blockage

Satoshi Yukawa, Macoto Kikuchi and Shin-ichi Tadaki1,

Department of Physics, Faculty of Science, Osaka University, Toyonaka 560
1Department of Information Science, Saga University, Saga 840

(Received April 18, 1994)

Effects of a bottleneck in a linear trafficway is investigated using a simple cellular automaton model. Introducing a blockage site which transmit cars at some transmission probability into the rule-184 cellular automaton, we observe three different phases with increasing car concentration: Besides the free phase and the jam phase, which exist already in the pure rule-184 model, the mixed phase of these two appears at intermediate concentration with well-defined phase boundaries. This mixed phase, where cars pile up behind the blockage to form a jam region, is characterized by a constant flow. In the thermodynamic limit, we obtain the exact expressions for several characteristic quantities in terms of the car density and the transmission rate. These quantities depend strongly on the system size at the phase boundaries; We analyse these finite size effects based on the finite-size scaling. ©1994 The Physical Society of Japan

KEYWORDS: traffic flow, dynamical phase transition, cellular automaton, finite size scaling
URL: http://jpsj.ipap.jp/link?JPSJ/63/3609/
DOI: 10.1143/JPSJ.63.3609


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