高速公路主线限速与匝道融合的协调控制

Coordinated control of variable speed limits and ramp metering

中文关键词  交通工程  主线限速  匝道融合  协调控制  多agent技术

英文关键词  traffic engineering  speed limits  ramp metering  coordinated control  multi-agent

中文摘要

      为缓解高速公路的交通拥挤, 主线限速、匝道融合等常被应用, 因主线限速和匝道融合经各自优化获得的控制策略可能存在矛盾, 故二者协调是必须的, 而如何建立和求解二者的协调控制模型还没有有效方法. 本文基于宏观交通流理论和多agent 技术研究了此协调控制问题. 为此首先阐述了高速公路的一般宏观交通流模型; 然后分析主线限速、匝道融合的交通特性, 建立了主线限速－匝道融合交通流模型; 并协调主线限速和匝道融合, 建立了协调控制模型. 最后, 基于多agent 技术和分层递阶结构提出了协调控制模型的求解算法, 并给出了应用此方法控制仿真高速公路的一个实例.

英文摘要

      In order to alleviate or eliminate congestion on a freeway, the dynamic traffic control measures, such as speed limits and ramp metering, are usually adopted. Because the control strategies of speed limits and ramp metering,obtained by optimization separately, may be inconsistent, it is necessary to coordinate speed limits and ramp metering. Unfortunately, there is no effective way to build and solve coordinated control model of speed limits and ramp metering. Based on macroscopic traffic flows theory and multi-agent methods, coordinated control model of speed limits and ramp metering is proposed in this paper. Firstly, a macroscopic traffic flows model of freeway is briefly introduced. Secondly,a speed limit-metering traffic flows model is suggested after traffic characteristic of speed limits and ramp metering is analyzed. Thirdly, coordinated control model of speed limits and ramp metering is proposed and solved based on themulti-agent methods and hierarchical structure. Finally, an example to control simulation freeway is given to illustrate the construction approach.