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物理学报. 2005, 54(10): 4621-4626.
doi: 10.7498/aps.54.4621.
智能交通系统的元胞自动机交通流模型
- 收稿日期: 2004-11-12
- 修回日期: 2005-03-01
- 刊出日期: 2005-05-05
摘要: 在Nagel-Schreckenberg(NS)模型的基础上，提出一种可应用智能交通系统（ITS）信息的新的交通流元胞自动机模型. 其中考虑了有效间距及刹车灯的作用，并引入了可变安全间距的新概念. 数值模拟表明：对于这种改进的ITS元胞自动机模型，道路交通量有了显著提高，体现了智能交通的优越性——有效地扩大交通流量，减少阻塞生成. 当考虑快车和慢车的混合交通流时，发现即使少量的慢车也会导致交通流量大幅度下降，说明了严格实施快慢道行驶的必要性.
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关键词:
- 交通流 /
- 智能交通系统（ITS） /
- 元胞自动机模型 /
- 刹车灯 /
- 可变安全间距
English Abstract
Cellular automaton traffic flow model considering intelligent transportation system
- Received Date:
12 November 2004
- Accepted Date:
01 March 2005
- Published Online:
05 May 2005
Abstract: A novel cellular automaton model for traffic flow on highway is proposed considering Intelligent Transportation System (ITS). Based on the Nagel-Schreckenberg model (NS for short), it includes effective gap and brake light. Moreover, a novel concept about the variable security gap is introduced. The simulation shows that the road capacity of the modified ITS cellular automaton model is higher than the measured data on certain highway, further indicating the important role of ITS,enlarged traffic flow and suppressed traffic jam. The mixed traffic flow related to two different vehicles' velocity is studied. The simulation shows even few slow vehicles will lead to drastic decrease of traffic flow, which demonstrates the necessity to implement strictly special fast lane.
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