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A Method of Signal Control Period Division Based on Trajectory Data

A technology of signal control and time division, applied in the research field of intersection signal control, to achieve the effect of saving installation and maintenance costs, wide coverage, and high installation and maintenance costs

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Method of Signal Control Period Division Based on Trajectory Data
  • A Method of Signal Control Period Division Based on Trajectory Data
  • A Method of Signal Control Period Division 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 present invention relates to a signal control period division method based on trajectory data, comprising the following steps: Step S1: Based on the basic relationship of traffic wave theory, Greenhill linear model and the three parameters of flow density and velocity, the relationship between the wave velocity and the flow of the assembled wave is obtained ;Step S2: Obtain the input data by superimposing the trajectory data of the same intersection for many days and the same time period; Step S3: Obtain the wave velocity of the assembly wave based on the input data, the speed threshold division method and the dynamic equation; Step S4: Calculate the wave velocity of the assembly wave Carry out clustering, and divide the signal control period based on the relationship between the wave velocity of the build-up wave and the flow rate. Compared with the existing technology, it not only improves the operational efficiency and safety level of the signal-controlled intersection, but also saves the installation and maintenance costs of fixed detectors.

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 Patents(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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