基于定量分层模型的多匝道协调控制次序

针对城市快速路交通拥堵严重的问题,基于QHM(定量分层模型)并利用交通风险评估技术,提出了一种多匝道协调控制次序的方法.利用QHM将快速路通道合理分区,以各分区当前状态与临界状态密度差值比为主要指标构建通道多匝道优先级控制矩阵,进而确定各分区匝道的优先控制次序,以保证各分区交通流的稳定性和公平性,实现通道多匝道协调控制.最后,应用微观交通仿真软件Vissim验证了模型的可靠性和有效性.

Control Priorities of Coordinated On Ramps Metering Based on Quantitative Hierarchical Model

To alleviate the traffic congestion problems on urban freeways, a method is proposed to determine the control priorities of coordinated on ramps metering of urban freeways using the risk assessment techniques and the QHM(quantitative hierarchical model) to classify a freeway corridor into sub sections. The priority matrix is constituted by the density ratio of the current status of the sub sections over the critical status and is used for the determination of control priorities of multi ramps of freeway corridors. It can ensure the smoothness, fairness and consistency among sub sections. Finally, the reliability and the feasibility of the proposed model is verified by the case using the Vissim simulation.