Localized defects in a cellular automaton model for traffic flow with phase separation

被引：28

作者：

Pottmeier, A ^{[1
]}

Barlovic, R

Knospe, W

Schadschneider, A

Schreckenberg, M

机构：

[1] Gerhard Mercator Univ Duisburg, Fakultat 4, D-47048 Duisburg, Germany

[2] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2002年 / 308卷 / 1-4期

关键词：

Nagel-Schreckenberg model; stochastic process; cluster formation; phase transition;

D O I：

10.1016/S0378-4371(02)00547-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the impact of a localized defect in a cellular automaton model for traffic flow which exhibits metastable states and phase separation. The defect is implemented by locally limiting the maximal possible flow through an increase of the deceleration probability. Depending on the magnitude of the defect three phases can be identified in the system. One of these phases shows the characteristics of stop-and-go traffic which cannot be found in the model without lattice defect. Thus our results provide evidence that even in a model with strong phase separation stop-and-go traffic can occur if local defects exist. From a physical point of view the model describes the competition between two mechanisms of phase separation. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：471 / 482

页数：12