Grace车队密度散布模型的更正及应用  

Modification of Grace′s Density Diffusion Model and its Application

作　　者：刘灿齐[1] 杨晓光[1] 

机构地区：[1]同济大学,上海200092

出　　处：《公路交通科技》2001年第1期62-64,共3页Journal of Highway and Transportation Research and Development

基　　金：973重点基础研究规划发展项目资助(G1998030408)

摘　　要：首先剖析Grace的交叉口车队密度散布模型 ,发现其错误所在。进而研究车队散布中的密度变化规律 ,提出正确的密度散布模型。并且将该模型用来推导下游信号灯交叉口的绿灯开始被截的车辆数的数学表达式 ,这个结果可用于相邻交叉口信号灯协调控制。Grace's density diffusion model is dissected, with error having been found. The evolving law of density during the diffusion of traffic platoon at signal-intersection is researched, and right density diffusion model is got. At last, the model is used to infer the expression of the number of vehicles queued before the green time of downstream signal intersection, which are useful in the control of coordinated signals of neighbor intersections.

关 键 词：信号灯交叉口 车队 密度散布模型 信号灯协调控制 

分 类 号：U491.51[交通运输工程—交通运输规划与管理]