基于MFD的多路网子区协调交通控制策略

MFD-based Coordinated Traffic Control Strategy for Multiple Road Network Sub-regions

为了缓解大规模路网的交通拥堵,提出了一种基于宏观基本图的多路网子区协调控制策略。首先,将实际路网划分为城市道路网络的核心区域和相邻区域,并以此以获得不同区域的宏观基本图特征。假设在路网核心区域采用控制策略,进而得到核心区域的预期溢出车辆数;计算出当相邻区域可增加的车辆数量接近核心区域的溢出车辆数量时路网核心区域的绿灯压缩时间。之后对核心区域采取应用了压缩绿色时间的控制策略,使得促进核心区域和邻近区域的交通状况趋于一致,改善整个路网的交通性能。通过实际道路网络建立了仿真路网,并利用仿真工具SUMO对上述区域控制策略的效果进行评估。仿真结果表明,基于MFD的多路网子区协调交通控制策略的实施可以提高整个路网的运行指标。

To alleviate the traffic congestion of the large-scale road network,this paper proposes a road network area control strategy MFD-based.First,get all areas of urban road network,and obtain the MFDs of the areas.Suppose that a control strategy is adopted in the core area,and the expected number of overflow vehicles in the core area is obtained.The number of vehicles that can be increased when the adjacent area is close to the number of overflow vehicles in the core area is calculated the green light in the core area of the time road network compresses the time.Then the control strategy of compressing the green time adopted in the core area,which promoted the consistency of the traffic conditions in all areas,and improved the traffic performance of the entire road network.This paper establishes a simulated road network through the actual road network,and uses the simulation tool SUMO to evaluate the effect of the above-mentioned regional control strategy.The simulation results show that the implementation of the MFD-based multi-road network sub-area coordinated traffic control strategy can improve the operation index of the entire road network.