交通流双车跟驰模型与数值仿真

基于全速度差(FVD)模型，考虑双前车信息的影响，提出了交通流双车跟驰模型.通过线性稳定性分析，得到了改进模型的稳定性条件. 与FVD模型对比研究表明，改进模型的稳定区域有明显增加.数值模拟结果表明，改进模型通过调节次近邻前车信息，可以避免FVD模型中因为反应系数较小时出现负速度的缺陷.同时也表明次近邻前车对交通流存在不可忽视的影响. 关键词： 交通流 双车跟驰模型 模拟

Two-car following model of traffic flow and numerical simulation

Based on the full velocity difference (FVD) model, with the consideration of the effect of information about the two leading cars to the following car, an improved two_car following model of traffic flow has been deduced. The linear stable judging condition is obtained to the improved model by its stability analysis, which shows the stability range of the improved model is obviously larger than FVD model by comparing them. Numerical simulation shows that our model can avoid the disadvantage of negative velocity occurring at small reaction coefficient in FVD model by adjusting the information of the next-nearest-neighbor leading car. And there is unavoidable effect to traffic flow from the next-nearest-neighbor leading car’s information.