Study On The Method And Simulation Of Optimal Traffic Coordination Control On Urban Arterial Road

Congestion of urban traffic has become a difficult problem for urban development and people's life, management of city traffic congestion has become an important part of city work.The reasonable timing of urban traffic signal control is an important means to make better use of urban road time and space resources,with the increase of traffic congestion,the requirement of fine timing and rationalization of signal timing is improved.In the urban traffic, the adjacent intersections are often interrelated and influence each other due to the large traffic. So it is not able to solve the traffic problems of the urban main road if only to pay attention to the traffic control of single intersection. The reasonable distribution of signal cycle, green signal ratio and phase difference of intersection is the method to improve the benefit of traffic signal control system. Because of the limitation of traffic flow composition,road driving condition and traffic signal timing scheme, it is not easy for many traffic flow to get good results. The effect of coordinated control consists of many factors, such as composition of traffic flow, cycle, ratio of green signal, travel time and phase sequence. Most of the previous studies were based on the premise that the phase sequence of each intersection was unchanged,because if the optimization of phase sequence was introduced into the coordinated control, the optimization and the difficulty of the solution would be greatly increased. Invariant phase sequence limits the solution space of the coordinated control scheme, and limits the traffic signal control system take maximum function.In order to improve the benefit of arterial coordination control system, a coordinated control strategy based on signal phase sequence optimization is proposed in this paper. By adjusting the phase sequence of the intersection, the scope of the basic parameters of the coordinated control is enlarged, and the maximum benefit of the coordinated control model is brought into. Firstly, in this paper, the structure of the trunk coordination control system is designed, and the control principle of the system is put forward. Secondly, study on the optimization method of the signal cycle, the split and the offset. On this basis, the restrictive relationship between phase sequence and coordinated control is analyzed. Then, in this paper, we propose a strategy for coordinating conflict at intersections, binary form is used to encode the phase sequence, the phase sequence model based on vehicle average delay is established, and multi population genetic algorithm was used to solve the optimal phase sequence combination scheme. Optimize the basic parameters of each intersection. Finally, a case study of the Beisan road in the city of Shihezi was conducted.The simulation results show that comparing with the traversal method, multi population genetic algorithm can improve the effectiveness of phase sequence optimization. VISSIM software is used to build the road network model, compare with the current traffic control scheme, and the average delay time of vehicles, the feasibility of the method is illustrated.