基于自主代理和元胞自动机的交通流模型

Modeling Traffic Flow Based on Autonomous Agents and Cellular Automata

提出一种新的元胞自动模型用以模拟单道高速车道的交通流动。一个机动车驾驶单元可以抽象为一个自主代理。模型集中于多种代理的提前相互作用和物理限制(特别是加速、减速能力)。物理限制通过加速减速的双向状态实现。给出了基本图、速度位置图、速度时间图和相位图,并利用互相关函数来辨别自由流和同步流。模拟结果显示这个模型能够描述大部分实际观测的结果。

This paper presented a new cellular automaton model to simulate traffic flow on a singl}lane highway. Adriver-vehicle unit was abstracted to be an autonomous agent. The model was focused on multiple autonomous agents＇ interactions ahead and agents＇ physical restrictions （particularly, acceleration and deceleration capabilities）. The physical restrictions were realized by dual-regime acceleration and deceleration capabilities. The fundamental diagram, speedlocation plot,spacctime plot and phase diagram were presented.The cross correlation function was studied to identity the free flow and synchronized flow. The simulation results show that the model can reproduce the most empirical findmgs.