Abstract: This artiele dcals with the model of frceway traffic flow. We set up in this article the nonlinear-dis-crete-dynamic traffic flow model and optimization analysis model of freeway traffic flow.We also created two kinds of optimization objeetive functions in dctail at rush hours and non-rush hours, and diseussed the teehnique of parametric inference in the models.At last,We calculated actually freeway states from Xian to Ling tong both at rush hours and non-rush hours.

Key words: freeway, traffic flow, parametric inference, optimal state

摘要： 本文对高速公路进行了两级分段，以车流密度ρ(k)和主流速度v(k)作状态变量，将人口匝道车流量ri(k)作控制变量，建立高速公路非线性离散动态交通流数学模型和交通流优化模型，提出了模型中参数辨识的优化算法，分别建立了高峰期和非高峰期两种情况优化目标函数，最后，实际计算了西(安)临(潼)高速公路高峰期和非高峰期的优化状态．?

关键词: 高速公路, 交通流模型, 参数辨识, 最优状态