A Flow Estimation Method for Urban Intersection Based on Floating Vehicle Data

A technology of floating car data and intersections, applied in traffic flow detection, data processing applications, neural learning methods, etc., to achieve the effect of accurate flow data and simple calculation

Active Publication Date: 2022-03-15
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Therefore, there are inherent deficiencies and shortcomings in the traditional traffic flow acquisition method

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  • A Flow Estimation Method for Urban Intersection Based on Floating Vehicle Data
  • A Flow Estimation Method for Urban Intersection Based on Floating Vehicle Data
  • A Flow Estimation Method for Urban Intersection Based on Floating Vehicle Data

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specific Embodiment approach

[0064]Floating car data collection: Use the in-vehicle device or taxi software installed on taxis and online car-hailing to collect the motion status information of the floating car in real time, including the id of the vehicle, the latitude and longitude of the vehicle, the speed of the vehicle point, the time stamp of the vehicle operation, etc. The data is transmitted to the central server through the wireless network, and the sampling and transmission frequencies of the data are high frequency and intermediate frequency (sampling and transmission interval <5s / time is called high frequency, 5s / time

[0065] Map road network information extraction...

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Abstract

The invention provides a method for estimating flow at urban intersections based on floating car data. The method first uses Webster's delay theorem to quantitatively describe the relationship between the phase flow at urban intersections and the delay of vehicles being blocked. Delay is used as the input data to calculate the phase flow; secondly, considering the accuracy of the flow data calculated above is not high, the RBF neural network approximation algorithm is used to correct the data, and the comprehensive performance indicators of the approximation parameters are measured by the floating car. Delay and travel time obtained as items. Through this method, the phase flow data with high accuracy can be obtained by using the floating car data, which can provide support for the signal control and optimization of urban intersections, thereby effectively improving the control efficiency of urban road intersections and achieving the purpose of alleviating congestion.

Description

technical field [0001] The invention belongs to the technical field of urban intelligent transportation, and in particular relates to an urban intersection flow estimation technology using floating data with a low proportion to provide data support for intersection signal control and optimization. Background technique [0002] Obtaining the flow data of each phase of the urban intersection is the premise of traffic signal control. There are two traditional methods for obtaining flow data: one is measured by a fixed detector deployed behind the stop line at the controlled intersection, which has The representative ones are the British SCOOT traffic control system and the Australian SCATS traffic control system; the other is measured by manual or manual hand-held devices. At present, the traffic management departments of some cities in my country are still optimizing the timing of controlled intersection signals. This method is often used. The urban traffic flow driven by trave...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/26G06N3/08G08G1/01G08G1/065
CPCG06N3/08G06Q10/04G06Q50/26G08G1/0104G08G1/065
Inventor 张立立王力张海波何忠贺
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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