与交通控制协同的交通流准均衡分配模型研究  

Study on Quasi Equilibrium Assignment of Traffic Flow coordinated with traffic control

作　　者：保丽霞[1] 杨兆升[1] 刘雪杰[1] 刘新杰[1] 

机构地区：[1]吉林大学南岭校区交通学院,吉林长春130025

出　　处：《ITS通讯》2005年第4期23-25,共3页

摘　　要：本文从路网均衡最优的角度，考虑交叉口交通信号控制对交通流的阻滞延误，建立了以路网总出行时间最小为目标的交通流均衡分配方程。通过引入拥挤度的概念，提出一个准均衡分配算法，算法不苛求能在一个问隔内使混乱交通流趋于平稳，而是在一定交通需求下，根据路段的运行状况（拥挤度），加载或卸载路段交通量，并考虑驾驶员出行特性，优化交叉口最佳信号配时，使交通流在不断反馈与不断调整过程中达到最优。Urban Traffic Flow Guidance System （UTFGS） and Urban Traffic Control System （UTCS） are two effective traffic management methods in ITS. In this paper, from the point of system optimization, a traffic follow equilibrium assignment model is presented with the aim of minimizing the total travel time of the network. In the model, the link cost contains travel time between two intersections plus delay at the downstream intersection. To make the model easier solved, the paper introduces the definition of congestion measurement, and presents a quasi equilibrium assignment algorithm. The algorithm may not have enough ability to make the congested traffic flow become smooth immediately, but disseminate traffic guidance information （via broadcast or in-vehicle equipment） to divert oversaturated traffic volume under certain traffic demand at consecutive intervals. At the same time, optimal traffic signal timing is got predict traffic flow reassignment with considering drivers behaviors. Thus, through the dynamic coordination of UTFGS and UTCS, the equilibrium traffic flow comes into being.

关 键 词：城市交通流诱导系统 城市交通控制系统 协同 准均衡分配 

分 类 号：U491.112[交通运输工程—交通运输规划与管理] U491.123[交通运输工程—道路与铁道工程]