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A Threshold Setting Method for Dynamically Adjusting the Attributes of Variable Guidance Lanes at Signal Control Level Intersections

A signal control, plane crossing technology, applied in the field of intelligent transportation, to achieve good applicability, avoid frequent changes, and improve the accuracy of threshold setting

Active Publication Date: 2020-11-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the variable guiding lane is not "variable anywhere at any time", and it must take into account many factors before it can really play a role

Method used

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  • A Threshold Setting Method for Dynamically Adjusting the Attributes of Variable Guidance Lanes at Signal Control Level Intersections
  • A Threshold Setting Method for Dynamically Adjusting the Attributes of Variable Guidance Lanes at Signal Control Level Intersections
  • A Threshold Setting Method for Dynamically Adjusting the Attributes of Variable Guidance Lanes at Signal Control Level Intersections

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Experimental program
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Embodiment 1

[0065] Taking a signalized intersection as an example, the setting method of the dynamic adjustment threshold of the variable directional lane attributes at the intersection is expounded in detail.

[0066] 1) After investigation, the basic data of the intersection in the initial state are shown in Table 1:

[0067] Table 1 Basic data of intersections

[0068] N L

N S

B S

W S

T g S

g L

1 3 10％ 3.5m 90s 30s 25s

[0069] 2) According to the formula (1) and related parameter solving method, the relevant data are brought into the calculation to obtain the parameters of each lane group before and after the attribute change of the variable steering lane, as shown in Table 2 and Table 3.

[0070] Table 2 Parameters of each lane group before attribute change

[0071]

[0072] Table 3 Parameters of each lane group after attribute change

[0073]

[0074] 3) Given the traffic flow q of the through lane group S =1000(pcu / h), the se...

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Abstract

The invention discloses a signal control plane intersection variable guiding lane attribute dynamic adjustment threshold value setting method. The method comprises the following steps: acquiring an intersection geometrical parameter, a signal control parameter and basic traffic data; calculating saturation flow rate of each lane of approaches before and after variation of the variable guiding laneattribute; establishing a variable guiding lane attribute variation threshold value setting model; solving a turn-left vehicle stream threshold value corresponding to a plurality of straight-going vehicle flow rates; performing data fitting, and generating a threshold value curve. The invention provides a dynamic adjustment threshold value setting method for a lane steering function of a variableguiding lane. The method can provide parameter basis for traffic control, is effectively adaptive to dynamic fluctuations of each steering traffic streams of approaches of intersections, and is beneficial for improvement and promotion of time-space resource of the intersections.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, and in particular relates to a threshold value setting method for dynamically adjusting the attribute of a variable guiding lane at a signal control level intersection. Background technique [0002] The key node of the urban road network is the intersection. In a limited space, traffic vehicles merge, interweave, and diverge, which leads to complex conditions and phenomena in the traffic network and becomes the bottleneck of the urban road network. In recent years, with the acceleration of urbanization, urban traffic has begun to highlight the tidal phenomenon. The traffic flow of each turn at the level intersection of urban roads usually shows the characteristics of unbalanced dynamic changes. For intersections with obvious dynamic fluctuations of each turn traffic flow, the traditional Signal timing adjustment will no longer be applicable. Generally, due to the increase of the green li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G08G1/07G08G1/08G06F30/20
CPCG06F30/20G08G1/0104G08G1/0125G08G1/07G08G1/08
Inventor 甘婧项乔君郑展骥李林恒禹奥业郑康康
Owner SOUTHEAST UNIV
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