Adaptive Signal Control Method for Oversaturated Traffic Based on Inlet Flow and Outlet Capacity Coupling

Abstract

The present invention provides a supersaturation traffic adaptive signal control method with the coupling of inlet flow and outlet flow. An annular coil detector is employed to detect the time of the detector occupied by a vehicle and determine the traffic flow information statistical parameters; a phase threshold value calculation equation is established, the phase threshold value of each phase and the threshold value of the effective path are calculated; and finally, the phase adaptive control is performed, the phase with the maximum phase threshold value is selected, the adaptive control parameters are calculated, the minimum green light time is given to this phase once, the phase threshold of each phase is updated in real time after the phase green light is ended, the phase with the maximum phase threshold is selected, the minimum green light time is updated, the minimum green light time is distributed to the phase, and the steps are moved in circles. According to the crossing real-time condition, the supersaturation traffic adaptive signal control method with coupling of the inlet flow and the outlet flow can adaptively control signal control parameters and the green light time and sequence of each phase so as to facilitate saving the road resource, avoid the traffic jam, improve the road service level and finally realize the optimization control of the traffic flow on the time distribution and the reasonable distribution of the traffic flow on the space distribution.

Description

technical field [0001] The invention relates to an urban traffic system, in particular to an adaptive signal control method for oversaturated traffic. Background technique [0002] With the development of social economy and the improvement of residents' living standards, more and more urban residents have their own cars, which makes the number of urban motor vehicles increase rapidly. After all, urban space resources are limited, which is not enough to meet the increasing traffic demand with the increase of vehicles, so traffic congestion is getting more and more serious. The essential cause of traffic congestion is that the local traffic capacity does not match the traffic demand, which is the contradiction that demand exceeds supply. If the signal control method is unscientific, it will lead to excessive concentration of traffic distribution, and it will also trigger the intersection of urban main roads to fall into a trap during the traffic peak period. oversaturation si...

AI Technical Summary

Problems solved by technology

[0005] The above three types are not applicable in all occasions due to their own factors, time, location and other reasons; secondly, the calibration of model parameters is relatively cumbersome and completely depends on the experience of traffic researchers without any basis; finally, it can only deal with stop lines Traffic flow near arrivals and optimization within a limited time frame

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