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Saturation flow rate calculating method for urban road intersection

A calculation method and intersection technology, applied in the direction of traffic flow detection, etc., can solve the problems that it is difficult to eliminate the influence of headway, can not meet the traffic signal timing optimization saturation flow rate accuracy, etc., to achieve the effect of reliable and practical method

Active Publication Date: 2018-01-09
TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY
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AI Technical Summary

Problems solved by technology

This method is simple and easy to use, but it is difficult to rule out the influence of external factors such as vehicle type and weather on the headway in practical applications, and it cannot meet the requirements of traffic signal timing optimization for saturation flow rate accuracy

Method used

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  • Saturation flow rate calculating method for urban road intersection
  • Saturation flow rate calculating method for urban road intersection
  • Saturation flow rate calculating method for urban road intersection

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Embodiment Construction

[0050] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0051] As a first aspect of the present invention, a method for calculating saturated flow rate at urban road intersections is provided, wherein, as figure 1 As shown, the calculation method for the saturated flow rate of the urban road intersection includes:

[0052] S110. Collect traffic data at urban road intersections;

[0053]S120. Perform preprocessing on the traffic data, and store result data obtained after preprocessing;

[0054] S130. Calculate and store the average headway of the single-cycle urban road intersection in real time according to the Grubbs algorithm;

[0055] S140. According to the K-means clustering algorithm, the average headway of t...

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Abstract

The invention discloses a saturation flow rate calculating method for an urban road intersection. The method includes collecting traffic data of the urban road intersection; performing pre-treatment on the traffic data and storing result data obtained through the pre-treatment; performing real time calculation according to a Grubbs algorithm and storing average time headway of the urban road intersection in single cycle; according to a K-means clustering algorithm, performing clustering analysis on the average time headway of the urban road intersection in single cycle in identical weather conditions and acquiring a clustering analysis result; calculating the mean value of time headway in a saturation condition and acquiring the saturation flow rate of the urban road intersection in different weather conditions. The method provided by the invention improves precision of the saturation flow rate of the urban road intersection in different weather conditions.

Description

technical field [0001] The invention relates to the technical field of traffic control, in particular to a method for calculating saturated flow rates at urban road intersections. Background technique [0002] In recent years, with the rapid development of the national economy, the number of cars in China has continued to grow. In 2016, the number of cars in China reached 194 million. The ever-increasing number of cars has brought enormous pressure to the normal operation of the urban traffic system, and people have higher and higher requirements for the reliability and controllability of the traffic system. Urban road intersections are the throats of road traffic, and their traffic capacity directly affects the carrying capacity of the entire traffic network. Due to the mutual interference of motor vehicles, non-motor vehicles and pedestrians in different directions, problems such as congestion are prone to occur at intersections. The cost of adjustment through traffic or...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01
Inventor 罗为明袁建华马庆王敏陆文杰徐棱
Owner TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY
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