随机度反馈策略对路网中交通流的影响

Influence of randomizing degree feedback strategy on traffic flow in road network

考虑到现实路况的复杂性,建立备选路径路宽不同、车道数存在差异的路网模型,并提出了新的反馈策略——随机度反馈策略.通过分析随机度、平均速度、车辆数以及交通流量反馈策略对该路网模型交通流特性参数的影响,探究随机度反馈策略的优越性.仿真结果表明:随机度反馈策略下,路网中车辆运行有序,接近出口处道路上车辆排队长度短,车辆速度大.同时,通过分析平均流量随动态车比例变化情况可知,当动态车比例不大于0.6时,平均速度、车辆数及随机度反馈策略有效性相当;当动态车比例大于0.6时,平均速度、车辆数反馈策略下平均流量降低明显,策略失效,而随机度反馈策略下平均流量变化平稳,该策略能有效改善路网道路车辆通行状况.

Considering the complexity of road conditions, a road network model with different path widths and different lanes is established. A new feedback strategy of randomizing degree feedback strategy is proposed. By analyzing. The influence of the randomizing degree, average speed, number of vehicles and flux feedback strategy on the traffic flow parameters of the road network model, the superiority of randomizing degree feedback strategy was studied. The simulation results show that under randomizing degree feedback strategy, the vehicle runs orderly in the road network, the queuing length of the velicles near the exit is short, the speed is high. At the same time, when the dynamic vehicle ratio is less than 0.6, the average speed, the number of vehicles and the randomizing degree feedback strategy are equivalent;when the dynamic vehicle ratio is more than 0.6, the average speed, number of vehicles,the average flow under feedback strategy reduce significantly,and the average flow changes in a smooth with randomizing degree feedback strategy. Randomizing degree feedback strategy can effectively improve road network traffic conditions.