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Signal control period division method based on trajectory data

A signal control and time division technology, applied in the research field of intersection signal control, to save installation and maintenance costs, improve operating efficiency and safety level, and overcome the problems of low penetration rate and low sampling frequency.

Active Publication Date: 2020-02-28
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is a lack of methods to use vehicle trajectory data for signal control period division

Method used

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  • Signal control period division method based on trajectory data
  • Signal control period division method based on trajectory data
  • Signal control period division method based on trajectory data

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Experimental program
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Embodiment

[0053] This embodiment provides a method for dividing signal control periods based on trajectory data, including the following steps:

[0054] Step S1: Based on the traffic wave theory, the Greenhill linear model and the basic relationship between the three parameters of flow density and velocity, the relationship between the wave velocity of the assembled wave and the flow is obtained;

[0055] Step S2: superimpose the trajectory data of the same intersection for many days and the same time period to obtain the input data;

[0056] Step S3: Based on the input data, the velocity threshold division method and the dynamic equation, the velocity of the assembled wave is obtained;

[0057] Step S4: Carry out clustering on the wave velocity of the accumulation wave, and divide the signal control period based on the relationship between the wave velocity of the accumulation wave and the flow rate.

[0058] further,

[0059] In step S1, the process of solving the relationship betwe...

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Abstract

The invention relates to a signal control period division method based on trajectory data. The method comprises the following steps: S1, obtaining a relationship between the wave velocity and the flowof a concentrated wave based on a basic relationship among three parameters, namely a traffic wave theory, a Green-Hilbert linear model and a flow density velocity; S2, superposing the trajectory data of the same intersection in the same time period of multiple days to obtain input data; S3, based on the input data, a speed threshold division method and a kinetic equation, obtaining the wave velocity of the concentrated wave; and S4, clustering the wave velocity of the concentrated wave, and dividing a signal control time period based on the relationship between the wave velocity of the concentrated wave and the flow. Compared with the prior art, the operation efficiency and the safety level of the signal control intersection are improved, and the installation and maintenance cost of a fixed detector is reduced.

Description

technical field [0001] The invention relates to the research field of intersection signal control, in particular to a method for dividing signal control periods based on trajectory data. Background technique [0002] Traffic signal control is one of the most effective means to improve the efficiency and safety of intersection traffic, so many scholars optimize traffic control parameters, such as cycle, green signal ratio, phase sequence, etc., and traffic software such as TRANSYT, Synchro, PASSER, etc. The signal timing scheme is optimized. Due to the fluctuating and periodic characteristics of traffic demand, a single timing scheme cannot meet the needs of urban traffic control. Therefore, it is necessary to divide a day into several control periods, namely TOD, which is a commonly used traffic control scheme selection method. The TOD mode can significantly improve the efficiency of traffic control with low implementation cost and high reliability. [0003] In the TOD mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/081G06K9/62
CPCG08G1/081G06F18/23213
Inventor 马万经万丽娟俞春辉王玲
Owner TONGJI UNIV
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