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Prediction method for rapid road travel time

A technology of travel time and prediction method, applied in the field of intelligent transportation, can solve the problem of not accurately calculating the method of predicting travel time and so on

Inactive Publication Date: 2009-05-20
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no specific method for accurately calculating the predicted travel time on expressways

Method used

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  • Prediction method for rapid road travel time
  • Prediction method for rapid road travel time
  • Prediction method for rapid road travel time

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Embodiment Construction

[0056] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0057] figure 1 is a schematic flowchart of a method for predicting expressway travel time according to an embodiment of the present invention. In this method, there are 6 steps:

[0058] Step 1: Divide the expressway into multiple sections in space;

[0059] Step 2: Use the information obtained by the detector to calculate the average velocity of the detection section;

[0060] Step 3: Use BP neural network to predict the future value of the detection section velocity;

[0061] Step 4: Use the method of data fusion to obtain the spatial average speed of each road section;

[0062] Step 5: use the time-space discrete method to calculate the travel time of the road section;

[0063] In step 6, the travel time of each road section is accumulated to obtain the travel time of the expressway.

[0064] figure 2 It is a schematic diagram of e...

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Abstract

The invention provides an expressway journey time prediction method. According to the speed and flow information of each driveway obtained by a detector arranged on an expressway, calculation and prediction of journey time can be realized. The expressway journey time prediction method comprises the following steps: firstly, according to the position of the detector, the expressway is divided into a plurality of sections in space; by information obtained by the detector in one section, average speed of a detected section is calculated, and the future value of speed is predicted by a neural network; a data fusion method is adopted to carry out speed fusion for the detected section, thereby obtaining the space average speed of the section; and then the journey time of the section is calculated by a space-time discrete method; journey times of all sections are calculated in turn and are added up to obtain the journey time of the entire expressway. The expressway journey time prediction method can predict the journey time of an expressway so as to guide vehicles to make reasonable use of the expressway during going out, thereby playing an important role in relieving traffic congestion in large cities.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to a method for predicting travel time for roads. The invention can predict the travel time of the expressway, so as to guide the vehicles to make reasonable use of the expressway to travel, and relieve the problem of traffic congestion in big cities. Background technique [0002] In the field of ITS (Intelligent Transportation Systems) intelligent transportation research, the development and application of the dynamic traffic flow information collection system aimed at realizing the informatization and intelligence of road traffic is rapidly developing centered in Europe, the United States, and Japan. Prediction lays the hardware foundation. Many other countries and regions have also invested in the research activities of travel time prediction. At present, travel time prediction has become one of the hot issues in international research. [0003] With the deepening of I...

Claims

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Application Information

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IPC IPC(8): G08G1/01G08G1/052
Inventor 陈德旺魏天磊
Owner BEIJING JIAOTONG UNIV
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