Traffic signal coordination control scheme smooth transition method considering periodic constraints

Abstract

The invention provides a traffic signal coordination control scheme smooth transition period generation method considering intersection maximum and minimum signal periodic constraints. Coordination control is mainly adopted for urban intersection traffic signals, when conversion between a constant scheme and a coordination control scheme and conversion between different coordination control schemes are carried out, smooth transition of the schemes is required, so that smooth transition of the traffic signals can be realized. The method of the invention includes the following steps that: an intersection signal machine receives a new coordination control scheme, and different smooth transition schemes are adopted through judging whether an original control scheme is a coordination control scheme; consumption time required by current smooth transition is calculated according to the different smooth transition schemes; smooth transition schemes for increasing periods or decreasing periods are determined according to the consumption time; and the number and length of smooth transition periods can be obtained through calculation based on consideration on the intersection maximum and minimum periodic constraints. With the method of the invention adopted, smooth transition time can be effectively reduced with stable operation of an intersection ensured.

Description

technical field [0001] The invention relates to a smooth transition method of a traffic signal coordination control scheme, which is used for traffic management and control and belongs to the field of intelligent traffic research. Background technique [0002] In the implementation of coordinated control of traffic signals, due to the different phase differences between different schemes and the start time of scheme operation, the intersection cannot run the new scheme immediately after the original scheme period ends. The smooth transition between traffic signal control schemes is to avoid the above situation and ensure the stability and accuracy of the transition between the old and new traffic signal control schemes. While the new scheme operates according to the established time, the change of the traffic signal control scheme does not exceed a certain range, ensuring the stability of the traffic flow operation. Therefore, the smooth transition of traffic signal control...

AI Technical Summary

Problems solved by technology

[0003] The existing smooth transition method of traffic signal coordination control scheme mainly has the following disadvantages: (1) The constraints of the maximum and minimum period of the intersection are not considered, resulting in the situation that the period is less than the minimum period or greater than the maximum period, and then pedestrians crossing the street and vehicles queuing (2) It is impossible to reasonably determine the transition plan to increase or decrease the cycle according to the size of the consumed time; (3) The related methods are too complicated to be applied in practice

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