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Method for improving resolution of traffic space-time diagram

A high-resolution, spatiotemporal map technology, applied in the field of transportation, can solve problems such as the inability to display traffic dynamics, and achieve the effect of strong practicability, simple calculation process, and improved resolution

Pending Publication Date: 2022-07-29
BEIJING UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the widely existing low-resolution space-time map cannot display detailed traffic dynamics, the present invention provides a method for improving the resolution of the traffic space-time map

Method used

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  • Method for improving resolution of traffic space-time diagram
  • Method for improving resolution of traffic space-time diagram

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Embodiment Construction

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] see figure 1 , which is a flowchart of a method for improving the resolution of a traffic spatiotemporal map provided by an embodiment of the present application.

[0028] like figure 1 As shown, a method for improving the resolution of a traffic spatiotemporal map provided by an embodiment of the present application includes the following steps:

[0029] Step 1: Collect data and draw the original traffic space-time map.

[0030] Step 2: The original traffic space-time map is divided into grids, the collected data is projected according to the grid, and the average speed of each grid is calculated.

[0031] Step 3: Further refine the grid division and build a fine-grained grid velocity prediction model.

[0032] Step 4: Use a fine-grained grid speed prediction model for prediction to generate a high-resolution traffic spatiotempo...

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Abstract

The invention discloses a method for improving the resolution of a traffic space-time diagram. The method comprises the following steps: acquiring data, and drawing an original traffic space-time diagram; meshing and dividing a space-time diagram, projecting the acquired data according to grids, and calculating the average speed of each grid; further finely dividing the grid, and constructing a fine-grained grid speed prediction model; and performing prediction by using the fine-grained grid speed prediction model to generate a high-resolution traffic space-time diagram. Therefore, according to the method, the original'rough 'traffic time-space diagram is divided through gridding, the sub-grid speed prediction is completed by using the fine-grained grid speed prediction model, the'beautified' refined traffic time-space diagram is reproduced, and the function of improving the resolution of the traffic time-space diagram is realized. Therefore, more accurate basic analysis data for traffic state analysis and traffic event discrimination can be provided for traffic managers, and the proposal of traffic decisions is supported.

Description

technical field [0001] The present invention relates to the technical field of traffic, in particular to a method for improving the resolution of a traffic spatiotemporal map. Background technique [0002] Traffic spatiotemporal map is one of the most important analysis and visualization tools in the field of transportation. The key to mapping traffic space-time is to measure the speed corresponding to each space-time grid. The smaller the meshing granularity of the space-time map, the higher the resolution, and the more detailed the road traffic changes can be displayed. Ideally, the velocity of the grid can be accurately calculated by using 100% high-fidelity vehicle trajectories. However, the current information technology cannot support the collection of such a wide range of 100% high-fidelity vehicle trajectory data, and thus cannot support the acquisition of refined, high-resolution traffic spatiotemporal maps. In addition, in the real-time traffic system, 5min is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/02
CPCG06F30/20G06F2119/02
Inventor 贺正冰张园梦顾欣贾宁凌帅
Owner BEIJING UNIV OF TECH
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