中文摘要：

采用鱼群的某些行为来模拟重大交通事故下车辆的一些行为。如利用鱼群的避障行为,随机移动行为,约束行为等来模拟车辆的换道行为,自然行驶行为,行驶中的约束行为等。并针对鱼群的避障行为对应的车辆换道行为进行了深入的研究,给出了车辆的换道模型（EMLCM）,从三个方面介绍了该模型的特点。并给出了在重大交通事故下车辆的延误时间的具体模型及换道期间车辆速度和位置变化情况,最后通过仿真实验说明采用的方法和提出的模型是有效的,对延误时间的分析是合理的。

英文摘要：

The behavior of vehicle under serious traffic incidents was simulated by the behavior of artificial fish.For example,the behavior of lane changing,normal driving and constraint in driving were all simulated by the behavior of obstacle avoidance,random moving and restrain.The deep research of lane changing was given by obstacle avoidance of artificial fish under the serious traffic incidents and a kind of lane change model（EMLCM） was proposed under the traffic emergency incidents and the characteristics of the model was introduced from the different three aspects.At the same time,the time delay of the vehicle was researched under this situation and the reification of the time delay was given.Beside this,the variation of vehicle＇s speed and vehicle＇s position was given.The experimental results show that the method and model is effective and the analysis of the time delay is reasonable.