Intersection real-time traffic state estimation method and system based on multi-source data fusion
A real-time traffic and multi-source data technology, applied in the traffic control system of road vehicles, traffic control system, traffic signal control, etc., can solve the problems of inaccurate description and underutilization of traffic flow evolution law, and achieve explainability Strong performance, wide application range and good robustness
Active Publication Date: 2021-12-28
SUN YAT SEN UNIV
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Problems solved by technology
However, most of the existing technologies use simplified traffic flow models in terms of system models, taking the road section as the research unit, failing to fully consider the influence of the spatial queuing characteristics of the channelized area of the signal-controlled intersection, and the description of the evolution law of traffic flow is not accurate enough; Most of the measurement models use single-source data such as fixed-point detectors or floating vehicles, and fail to make full use of emerging intelligent networked vehicle trajectory data and further integrate multi-source data
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[0069] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
[0070] First, the technical terms appearing in this application are explained:
[0071] Flow direction: For a certain entrance of a signal-controlled intersection, use Ω={L,T,R} to indicate the flow direction set contained in the entrance, L indicates the left turn flow direction, T indicates the straight flow direction, R indicates the right turn flow direction, Then φ∈Ω represents a certain flow direction of the inlet; in particular, use Ω i,j represents the flow direction set contained in the cell (i, j), then φ∈Ω i,j Represents a specific flow direction within th...
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The invention discloses an intersection real-time traffic state estimation method and system based on multi-source data fusion, and the method comprises the steps: dividing a road section into different cells according to the geometric structure characteristics of the road section between adjacent intersections; optimizing a cellular transmission model according to a target influence factor to obtain an improved cellular transmission model, wherein the target influence factors comprise a queuing dissipation process, a shunting process, selective lane changing and lane sharing; establishing a system model according to the improved cellular transmission model; establishing a measurement model according to the fixed detector data and the vehicle trajectory data; fusing the system model and the measurement model according to a Bayesian filtering framework, and calculating posteriori estimation of the system state according to a particle filtering algorithm; and calculating the queuing length of each lane group in the traffic road according to the result of the posteriori estimation. The method is good in robustness, high in interpretability and wide in application range, and can be widely applied to the technical field of traffic control.
Description
technical field [0001] The invention relates to the technical field of traffic control, in particular to a real-time traffic state estimation method and system at an intersection based on multi-source data fusion. Background technique [0002] As an important part of urban traffic system, signal-controlled intersection is a decisive factor affecting the efficiency of urban road operation. Real-time and accurate traffic status information is a prerequisite and important input for intersection optimization, and is of great significance to effectively alleviate traffic. The acquisition of traffic state information mainly relies on traffic state detection technology and traffic state estimation technology. Among them, most of the existing traffic state detection technologies use fixed detectors (geomagnetic coils, electric police bayonet, etc.), floating vehicles, wireless communication and other technologies to collect vehicle motion information. However, most of the existing...
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Login to View More IPC IPC(8): G08G1/08G08G1/01G08G1/083G06K9/62
CPCG08G1/08G08G1/0125G08G1/083G06F18/25Y02T10/40
Inventor 黄玮胡洋
Owner SUN YAT SEN UNIV