Intersection traffic state parameter estimation method and system based on multi-source data

A traffic state and parameter estimation technology, which is applied in road vehicle traffic control systems, traffic control systems, data processing applications, etc., can solve the adverse effects of vehicle trajectory data traffic state parameter estimation accuracy, and the low popularity of motion detectors. , low penetration rate of vehicle trajectory data, etc.

Active Publication Date: 2021-09-10
SUN YAT SEN UNIV
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Problems solved by technology

Moreover, the popularity of mobile detectors is not high at this stage, and the vehicle trajectory data still has the problem of low penetration rate. The lack of vehicle trajectory data also has a negative impact on the accuracy of traffic state parameter estimation.

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  • Intersection traffic state parameter estimation method and system based on multi-source data
  • Intersection traffic state parameter estimation method and system based on multi-source data
  • Intersection traffic state parameter estimation method and system based on multi-source data

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[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0029] It should be noted that although the functional modules are divided in the system schematic diagram and the logical order is shown in the flow chart, in some cases, it can be executed in a different order than the module division in the system or the flow chart steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.

[0030]In order to facilitate the understanding of the embodiments of the present applicatio...

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Abstract

The invention discloses an intersection traffic state parameter estimation method and system based on multi-source data. The method comprises the following steps: building a vehicle delay model according to a traffic wave theory, and building a vehicle travel time model of a flow direction level according to the speed distribution characteristics of a vehicle; enabling a fixed-point detector to detect and obtain the flow of the road section entrance, and determining the number of vehicles arriving at the road section entrance; determining a traffic flow steering ratio of a road section by setting a virtual travel line according to a vehicle track acquired by a mobile detector; determining Bayesian networks of different flow directions according to the vehicle travel time model, the number of arrival vehicles and the traffic flow steering ratio; and solving the Bayesian network and determining the maximum queuing length and the average travel time of the vehicles in different flow directions. According to the embodiment of the invention, the vehicle track data and the fixed-point detector data are combined, and the parameter estimation method fusing the traffic wave theory and statistical analysis is established, so that the accuracy of traffic state parameter estimation is effectively improved.

Description

technical field [0001] The present application relates to the field of traffic control, in particular to a method and system for estimating traffic state parameters at intersections based on multi-source data. Background technique [0002] Traffic congestion is a representative "urban disease" problem faced in the process of new urbanization in my country, which has caused huge losses to social and economic development. The optimization of traffic conditions at intersections is the key to preventing and alleviating traffic congestion, and the estimation of traffic state parameters at intersections is an essential prerequisite for traffic optimization. In traditional traffic signal systems, fixed-point detectors are mostly used to obtain and estimate traffic state parameters, but factors such as the location of fixed-point detectors and detection frequency will affect the estimation accuracy of traffic state parameters, and the maintenance cost of fixed-point detectors is hig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/08G06Q10/04
CPCG08G1/0125G08G1/0104G08G1/08G06Q10/04Y02T10/40
Inventor 黄玮胡洋胡晶胡芙瑜张轩宇
Owner SUN YAT SEN UNIV
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