Intersection signal control time period dividing method

Abstract

The invention provides an intersection signal control time period dividing method. The method comprises the following steps that: the traffic flow data of one day of an intersection are acquired; the traffic flow data are converted into traffic flow vectors, and distances between every two adjacent traffic flow vectors are obtained; the time period of one day is divided into initial time segments through a big data-based CUSUM time sequence segmentation algorithm; merging processing is performed on the initial time segments according to a preset mode, and merged time segments are obtained; a clustering algorithm is adopted to carry out classification processing on the merged time segments according to the distances between the adjacent traffic flow vectors, so that classified target time segments are obtained; and the signal control strategy of each segment is determined according to the target time segments. The intersection signal control time period dividing method of the invention has the advantages of low dependence on traffic information acquisition and high reliability. With the intersection signal control time period dividing method of the invention adopted, traffic passing capability can be remarkably improved, and traffic delay can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of traffic signal control, in particular to a method for dividing time periods for signal control at intersections. Background technique [0002] With the rapid development of Intelligent Transportation System (ITS), the management of urban traffic is becoming more and more refined and digitized. The intersection of urban roads is the key to the fine management of urban traffic, and the signal control of the intersection is the most effective means of traffic management. Multi-period signal control is to divide a day into multiple time periods and use different control schemes to control signal intersections. The period division is the key technology of multi-period signal control. [0003] At present, the multi-period control period division methods at home and abroad are roughly divided into three categories: (1) manual experience division, that is, according to the traffic flow at the intersection colle...

AI Technical Summary

Problems solved by technology

[0004] The manual division method is mainly based on the subjective judgment of engineers and technicians. The division results are very subjective and one-sided, which has a great impact on the rationality of time division, and it is difficult to meet the randomness and fast-changing needs of modern urban traffic.

In the single-factor period division model, a large number of calculations are required for parameters such as period and green signal ratio, and the calculation is complicated. , it is impossible to accurately detect the difference in the flow of the two conflicting directions, and it is impossible to control it more finely

However, the multi-factor period division method overcomes the single-factor extraction object single problem.

However, too many influencing factors participate in the algorithm, not only the calculation is complicated, but also the division of time periods is too trivial, which seriously affects the control efficiency

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