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Visual evaluating method for urban traffic system state based on traffic flow phase character istic and its application

A technology for urban traffic and system status, applied in traffic control systems, road vehicle traffic control systems, traffic flow detection, etc., to achieve easy application, comprehensive data collection, and good accuracy

Inactive Publication Date: 2007-10-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0007] Here, the traffic system state evaluation problem between real-time traffic data and various advanced control methods is a key technology to ensure the effectiveness of the control system, but it is rarely involved

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  • Visual evaluating method for urban traffic system state based on traffic flow phase character istic and its application
  • Visual evaluating method for urban traffic system state based on traffic flow phase character istic and its application
  • Visual evaluating method for urban traffic system state based on traffic flow phase character istic and its application

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Embodiment

[0055] As shown in Figure 1, the present invention's urban traffic system state visualization evaluation method based on traffic flow characteristics comprises the following steps:

[0056] A. Collect real-time signal waveforms with a duration of not less than three months in a specific road section, and construct traffic flow state parameters;

[0057] B. Perform signal filtering on state parameters to obtain a sample population of traffic flow;

[0058] C. Calculate the mean and standard deviation of all samples in the sample population, and use the ratio of the standard deviation to the mean as the sample dispersion coefficient;

[0059] D. Construct and optimize the standard characteristic phase diagram (referred to as the standard phase diagram) for evaluation according to the strong aggregation characteristics of multi-dimensional state parameters of traffic flow;

[0060] E. Put the historical data, current data and forecast data of the traffic system on the standard p...

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Abstract

The present invention provides an urban traffic system state visualization evaluation method based on traffic flow characteristics. Said method includes the following steps: A, in specific road section collecting real-time signal waveform whose continuous time is not less than three months, forming traffic flow state parameter; B, making traffic flow state parameter undergo the process of signal filter treatment so as to obtain traffic flow sample population; C, calculating average value and standard difference of all the samples in sample population, and using ratio value of standard difference and average value as sample discrete coefficient; D, according to traffic flow multidimensional state parameter strong aggregation characteristics forming and optimizing standard characteristic-phase plane graph for evaluation; and E, placing historical data, current data and predictive data of traffic system on the standard phase graph, and visually distinguishing running state of traffic system and its change tendency.

Description

technical field [0001] The invention relates to a state evaluation technology of an urban traffic system, in particular to a method for visually evaluating the state of an urban traffic system based on traffic flow characteristics and its application. Background technique [0002] Urban road congestion is an important problem affecting the economic development of our country. With the deepening of the urbanization process and the continuous improvement of people's living standards, the urban population and motor vehicles have increased dramatically, and the urban traffic jam has become increasingly serious. There are currently two main categories of measures to control traffic congestion: the first category is to expand roads to solve the contradiction that road capacity cannot meet traffic demand in terms of quantity; the second category is to coordinate the above-mentioned contradictions through advanced scientific and technological means and tra...

Claims

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Application Information

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IPC IPC(8): G08G1/00G08G1/01G06Q50/00
Inventor 翁小雄谭国贤谭裕安翁丹叶丽萍姚树申黄征何站稳
Owner SOUTH CHINA UNIV OF TECH
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