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Road-section average travel time measuring method suitable for low-frequency sampling

A technology of average travel time and measurement method, which is applied in traffic flow detection and other directions, and can solve problems such as poor real-time performance and inability to measure the average travel time of road sections

Inactive Publication Date: 2010-06-16
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing road segment traffic parameter estimation model that the average travel time of the road segment cannot be measured and the real-time performance is poor, the present invention provides a road segment suitable for low-frequency sampling that can effectively measure the average travel time of the road segment and meet the real-time and accuracy requirements of traffic. Average travel time measurement method

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  • Road-section average travel time measuring method suitable for low-frequency sampling
  • Road-section average travel time measuring method suitable for low-frequency sampling
  • Road-section average travel time measuring method suitable for low-frequency sampling

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example

[0094] Example: Take a section of Huancheng West Road in Hangzhou City from north to south as the experimental section and conduct traffic investigation. The section is about 430m in length, basically closed, and the upper and lower intersections are signal-controlled. Signal controlled pedestrian crossing. Selecting such a road section for analysis can avoid vehicle loss on the one hand and obtain relatively complete data. On the other hand, both upstream and downstream intersections of the road section have signal control, which is similar to most road sections and has promotional significance. Select taxi GPS data from 13:30 to 14:30 (peak period) and 16:30 to 17:30 (peak hour) as experimental data. The calculation method we studied is used for calculation. The specific results are shown in Tables 1 and 2. Table 1 shows the average travel time of road sections during flat peak hours; Table 2 shows the average travel time of road sections during peak hours:

[0095] Period ...

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Abstract

The invention relates to a road-section average travel time measuring method suitable for low-frequency sampling, which comprises the following steps: (1) sampling taxi GPS data at low frequency to obtain the estimated time of each vehicle at the crossroads; (2) according to the geographical position information at each crossroad and the estimated time of each vehicle at the crossroads, obtaining the vehicle travel time of a certain road section as a sample *i; and (3) calculating the average travel time according to the following reference formula (8), wherein in the clustering center, tf stands for quick type, tm stands for medium type, and tl stands for slow type. The road-section average travel time measuring method suitable for low-frequency sampling can effectively measure the average travel time of the road section and meet the requirements for traffic real-time performance and accuracy.

Description

technical field [0001] The invention relates to a method for measuring the average travel time of road sections. Background technique [0002] Road section traffic parameter estimation model: multiple regression model, neural network, fuzzy reasoning model, speed integral model, endpoint time difference method, etc. The velocity integral model utilizes the discrete instantaneous velocity time series detected by the GPS probe vehicle, and applies the numerical integration method to calculate the traveling distance of the probe vehicle. The endpoint time difference method needs to determine the moment when the vehicle passes through the two endpoints of the investigated road section, and the difference between the time is the travel time of the road section. When the sampling interval is relatively short (t<10s), the results of the velocity integral model and the end-point time difference model are relatively close, and the error is relatively small compared with the actua...

Claims

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Application Information

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IPC IPC(8): G08G1/01
Inventor 董红召吴方国陈宁郭明飞郭海峰马帅
Owner ZHEJIANG UNIV OF TECH
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