Research On Signal Control Optimization Model Based On Phase Sequence

Arterial roads are important passages for urban traffic to achieve continuous traffic,and they are often referred to as the main artery of urban road traffic.As the key link between trunk roads and main roads,trunk crossings are important links between roads and trunk roads.To reduce traffic delay at the intersection of main roads is the key to achieve continuous traffic.It plays an important role in relieving the traffic pressure of urban roads.In order to seek the optimized signal control scheme,this paper puts forward the classic intersection signal control optimization model of urban trunk road by combining the research results of signal phase phase sequence research theory,single point signal control theory and main road coordination control theory at home and abroad.This model combines signal phase and phase sequence with signal timing,and discusses the feasibility of the design of signal control scheme based on phase phase sequence,and proposes a method of using signal phase matrix to express phase sequence of signal.The model uses the signal phase matrix and the effective green time as the optimization variable,and determines the target function according to the calculation formula of the road intersection total traffic delay.By analyzing the related constraints of traffic flow at the intersection of the main road,including the conflict point of the traffic flow and the value of the signal timing parameters,the combination of the penalty function and the constraint condition is determined.The algorithm of the model is a genetic algorithm.After optimizing the design,the minimum value of the target function value is sought on the basis of satisfying the constraints,and the single point signal control model and the main channel coordination control model are constructed in the edited code of MATLAB.Combining the actual traffic data of the road intersection,the traffic volume needed by the model is obtained by statistical analysis.The related traffic and parameters are replaced into the model,the phase matrix of the output signal and the time and time of the effective green light are obtained.Through the actual road traffic data operation model,and compared with the total traffic delay of the current signal control scheme,the results show that the optimization effect of single point signal control is about27%,and the optimization effect of the main road coordination control is about 24%,and the optimization effect of the model is verified.Finally,the VISSIM traffic simulation software is used to compare the optimized signal control scheme with the current scheme through traffic simulation.The traffic simulation results show that the average traffic delay obtained by the single point signal control model is about 27% lower than the present scheme,and the average traffic delay of the signal optimization scheme of the dry channel coordinated control optimization model is reduced by about 21% compared with the present scheme;the result shows that the optimized signal scheme has been reduced.The purpose of the average traffic delay at the signalized intersection is to further verify the validity of the model.Therefore,this model has achieved a good effect on the signal control scheme of the optimal trunk intersection,reducing the traffic delays at the intersection of the main road and improving the overall traffic capacity of the urban trunk network.