基于元胞自动机的城市道路仿真系统

Cellular Automaton Based Simulation for City Traffic

为解决实时交通仿真系统对计算效率的要求，本文提出一种针对交通信号控制下城市道路路段的元胞自动机模型。在模型中采取了适合城市交通特点的元胞空间划分和时间步长方案以及元胞更新规则。本文还给出基于此模型的一个小型仿真系统的软件体系结构。另外，本模型还能反应出驾驶员的进取性（aggressiveness）的状况，并对驾驶员存不同进取性下对变通的影响做了研究。通过现场采集的交通数据和CORSIM仿真平行的对比试验表明本文提出的模型在路段平均速度意义下与实际变通数据符合较好，并具有较高的运行效率。

A cellular automaton model is proposed for signalized street of city traffic, In the model, the spatio-temporal discretization scheme, rules for updating the state of cells are elaborately designed to adapt to the dynamics of city traffic. The software architecture of a small-scale simulation system based on the model is also presented. A special advantage of our model is that it can capture the variation of aggressiveness of drivers and a study of the effect of aggressiveness of drivers on city traffic is made. The result of the proposed simulator agrees well with that of field experiment and CORSIM in terms of average speed, and the proposed simulator shows obvious advantage in computing ability.