快速路出口辅路与地面交叉口协调控制策略研究

Coordinated Control Strategy of Expressway-Exit-Auxiliary Road Signal and Urban Road Intersection Signal

快速路出口及辅路通过的流量增大时,易造成出口下游交叉口的拥堵,同时拥堵会向上游蔓延造成快速路出口范围的拥堵。为缓解出口范围的拥堵,提出了一种新的协调控制策略。以辅路衔接路段排队为检测变量,协调计算出口下游交叉口的周期、绿信比和辅路的绿灯时长,并给出了各控制变量小步距连续调整的算法。仿真实验结果表明该协调控制策略是有效的,与固定配时策略相比出口匝道通过固定流量持续时间至少减少了10%。

When the expressway off-ramp flow and auxiliary road flow increases,it is easy to lead to the downstream intersection congestion which will spread to the upstream off-ramp scope rapidly.In order to relieve the traffic congestion in the scope of off-ramp of the expressway,a new coordinated control strategy is put forward.The queue of auxiliary convergence road is selected as monitoring variable in the coordinated control strategy,and downstream intersection cycle,split and auxiliary road green time are calculated.The control variables small-step adjustment algorithm is presented.The simulation results show the effectiveness of the coordinated control strategies proposed in this paper,and the throughput flow duration of off-ramp by the coordinated control strategy decreases at least 10% than by the fixed control strategy.