单路口交通流控制动态响应的仿真研究

要实现对交叉路口交通流的有效控制，必须研究路口交通流的动特性．由于单个路口是整个路网最基本的被控对象，而爱尔朗分布是一种包含了众多类分布的广义随机分布，随着其参数的变化能够提供一系列随机分布，从而较好地描述了交通流的不确定性．因此，针对车辆到达服从爱尔朗分布条件下单个交叉路口信号控制的动态响应，以使研究具有普遍性．鉴于交通流的不确定性和复杂性，无法建立数学模型，只能采用仿真试验的方法．从仿真试验的结果分析出路口交通流控制动特性的特点，得出一些对提高交通流控制效果有参考价值的结论．

Simulation study on dynamic response for an intersection

In order to control traffic flow at an intersection effectively, the dynamic responses of control timing must be researched. In this paper, the traffic flow at an intersection under the condition of Erlangian arrival and the control timing plans is simulated, because an intersection is the basic unit of a road network. By the way, Erlangian distribution is a generalized random distribution which contains a series of random distributions with this changing of it's parameters. Therefore, the uncertainty of traffic flow can be described with the Erlangian distribution, and the study under this condition has a better generality. Due to the uncertainty and complexity of traffic flow, mathematical modeling is impossible, the simulation tests can be used. The dynamic responses of control timing plans are obtained and analyzed based on the simulation results. The useful conclusions for increasing of effect of traffic control are obtained.