基于元胞自动机的航道交通流仿真

文章基于自动识别系统(automatic identification system, AIS)数据, 将汇入主航道的分支交通流对航道整体交通状况的影响进行研究, 该种情况类似于城市交通中匝道入口的汇入情形。鉴于航道内的该种情况, 以元胞自动机进行建模仿真; 并通过分析可追越条件下两船之间的速度关系, 发现其中规律与三相交通流理论中的速度适应机制相契合, 于是将基本图理论与三相交通流理论中的合理部分相结合, 构建一个既符合实际又便于模拟的单向双通道航道内的交通流模型, 并通过图像和时间序列相关分析对该模型进行说明和验证。此外还利用该模型对带有汇入主航道内的交通流出现的一些交通现象进行仿真和说明。

This paper simulated the traffic flow in channel with similar ramp entrance compared with road traffic engineering through cellular automaton(CA) method, taking into consideration the automatic identification system(AIS) data. And the speed relationship between the two ships under the condition of overtaking was analyzed. It is found that the rule of the speed of ships during overtaking is similar to the law of speed adaptation mechanism in the three-phase traffic flow theory, so it is full of necessity to integrate the reasonable parts of the fundamental diagram and three-phase traffic flow theories to build a new traffic flow model by deploying CA method in one-way dual channel, which is not only in line with the reality, but also easy to simulate. The model was illustrated and verified by the images and correlation analysis of time series. In addition, the model could be used to simulate and explain some traffic phenomenon which has a similar ramp entrance in marine traffic.