交通事件下快速路网匝道控制与路线诱导的集成控制

Integration of ramp control and route guidance under accident conditions

中文关键词  城市快速路网  交通事件  集成控制  粒子群优化

英文关键词  urban expressway networks  traffic incident  integrated control  particle swarm optimization

中文摘要

      本文建立了交通事件影响下匝道控制与路线诱导相结合的完全集成控制模型, 即建立了一个以节点分流比例与匝道调节率为控制变量的非线性最优控制模型, 模型中考虑了突发交通事件后快速路的交通特点, 基于粒子群算法设计了模型的求解算法. 以一个简单的小型路网为例, 讨论了突发事件后采用不同控制策略对系统的全局影响. 仿真表明, 匝道控制与路线诱导相结合的集成控制有效地降低了事件的影响.

英文摘要

      Under accident conditions, we propose a total integrated control strategy for the urban expressway networks, by making use of the ramp control and the route guidance. This strategy has a non-linear optimal model with the ramp metering and the splitting proportion as the controlled variables. It also takes into account the accidental traffic characteristics on the expressway. Based on the particle-swarm-optimization, we present a new numerical solution algorithm for this strategy. With a relatively simple network as example, we discuss the accidental impacts on the system performance under different field scenarios. The simulation results indicate that the total integrated strategy reduces the traffic retardation caused by the accident.