交通仿真系统中的纯微观跟车模型

Pure-micro Car Following Model for Traffic Simulation System

针对目前在交通仿真系统中的跟车模型忽略车辆个体性能差异的缺陷 ,提出了一种纯微观跟车模型 .该模型以某一扫描时刻为基点 ,根据前、后车辆在当前时刻的状态 ,考虑前、后车的加减速性能 ,以后车“紧密”而又“安全”地跟随前车行驶为原则确定后车在下一扫描时刻的加 /减速度 .纯微观模型更准确地反映了不同性能车辆的跟车行为 ,而且具有模型标定相对容易。

Aimed to solve the deficiency of neglecting the different performances among various individual vehicles,which exists in the present car following models used for traffic simulation,this paper puts forward a pure-micro car following model.Taking a scan time interval as base point and according to the lag and lead vehicles' current status,the model determines the acceleration/deceleration rate of the lag vehicle based on the 'close' and 'safe' car following principle,and with the consideration of the accelerate/decelerate performance discrepancies of different types of vehicles.The pure-micro car following model gives a more accurate description of car following activity,and has its virtues of calibration easiness and adaptability to wide range usage.