Abstract: In the simulation of large cities’ traffic situation, the macroscopic model compared to the microscopic model, has advantages of high efficiency, clear physical meaning, but lack of vehicles in a detailed description of each moment. To make the macroscopic model of traffic simulation display more intuitive, combined with the update method of microscopic model, this paper puts forward the visualization method based on the macroscopic model. The vehicle’s initial position and speed are obtained by the road vehicles’ initial density; then the vehicle information is updated according to the macroscopic road speed, to make the density of macro-sections consistent with the microscopic vehicle current density. This method can give the vehicles’ motion of each time in the macroscopic model, and add the microscopic details. A case study of setup planning is presented to verify the feasibility of the method.

Key words: traffic flow, visualization, macroscopic model

摘要： 在大型城市的交通态势模拟中，宏观模型相比于微观模型，具有效率高，物理意义明确的优点，但缺乏车辆在各个时刻的细节描述。为了使宏观模型的交通模拟的显示更加直观，结合微观模型的更新方式，提出了基于宏观模型的可视化方法。通过道路上的车辆初始密度得到所有车辆的初始位置和速度；根据宏观路段速度更新车辆信息，使得宏观路段密度值与微观车辆所构成的车辆流密度相符。该方法能够给出宏观模型中车辆在各个时刻的运动情况，并添加了微观上的细节。以实例证明了该方法的可行性。

关键词: 交通流, 可视化, 宏观模型