Transition method for active phase-oriented arterial road coordinate signal control scheme

Abstract

The invention belongs to the field of an intelligent traffic control technology and relates to a transition method for an arterial road coordinate signal control scheme. The transition method is characterized by comprising the following steps: establishing conceptions of a leading phase chain, active phases and the like, taking green lamp transition time of the active phase as leading power for receiving the difference of technique parameter values of the current scheme and a new scheme; immediately starting transition process at the moment of issuing a scheme switching command; strictly limiting the variation amplitude of the green lamp transition time of the active phase, and leading the green lamp transition time of the active phase into solution procedure of transition process lasting time, transition signal period time and green lamp transition time; and respectively establishing nonlinear integer programming models for the transition signal period time and the green lamp transition time to the transition process experiencing a plurality of transition signal periods, the given transition process lasting time and the number of transition signal periods. The transition method has the characteristics of being fast and stable, and can be widely applied in a traffic signal control system.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic control, and relates to a transition method of an arterial road coordination signal control scheme. Background technique [0002] The coordinated signal control of urban arterial roads is to realize the linkage effect of traffic lights at adjacent intersections along the urban arterial road, so that some vehicles from the main direction of the upstream intersection can pass through several downstream intersections continuously at a certain speed. Phase difference, signal cycle time and green light time are the key technical parameters of the arterial coordinated signal control scheme. [0003] In order to adapt to the macroscopic time-varying characteristics of road users' traffic demand, traffic engineers are accustomed to dividing the control process of the whole day into multiple control periods. In each control period, the technical parameter values ​​of the control scheme are det...

AI Technical Summary

Problems solved by technology

[0011] 1. When the local signal controller receives the program switching command, it cannot start the transition process immediately, which may lead to a relatively long duration of the transition process;

[0012] 2. In the process of solving the duration of the transition process, the change range of the transition signal cycle time is not effectively restricted by the allowable change range of the transition green light time of each phase. Once the calculation result of the transition signal cycle time is too small, it may cause the transition of some phases The calculation result of the green light time is less than the minimum green light time allowed, which leads to the failure of the solution method for the transitional green light time;

If the first solution is adopted, it will lead to a significant increase in the duration of the transition process. If the second solution is adopted, the final calculation result of the transition green light time may be quite different from the value ratio of the green light time of each phase in the new scheme.

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