FRESP(FREeway traffic flow Simulation Package)是一种高速公路交通流宏观仿真程序包。它以Pagne 模型为基础,通过改进交通流密度、速度关系曲线,并引入交通流预测模型研制而成。该程序包能较真实地反映高速公路各路段以及匝道附近交通流速度、密度和流量等参数的动态变化和相互关系;预测出各个时刻流出各匝道的交通流量以及整个网络的运行指标。是研究和评价商速公路最优控制策略的有效工具。FRESP 由交通流动态模型和交通流预测模型组成。本文较详细地介绍了这两个模型的原理和结构。 FRESP (FREeway traffic flow Simulation Package) is a macro simulation package of freeway traffic flow. It is based on the Pagne model, developed by improving the traffic flow density and speed curve and introducing the traffic flow prediction model. The package can more accurately reflect the dynamic changes and interrelations of traffic flow speed, density and flow in the various sections of the expressway and in the vicinity of the ramp; and predict the traffic flow and the operation index of the entire network at each moment out of each ramp. It is an effective tool to study and evaluate the optimal control strategy of Shangrong Expressway. FRESP consists of a traffic flow dynamic model and a traffic flow prediction model. This article describes in more detail the principles and structure of these two models.