Method for Estimating the Average Speed ​​of Freeway Sections Based on Support Vector Regression Machine Fusion

Abstract

The invention discloses a support vector regression machine fusion-based expressway road section mean velocity estimation method. The method includes the following steps that: 1) an expressway to be researched is selected, and basic data are obtained; 2) a road section mean velocity is obtained through using a trajectory method-based correction algorithm and according to fee charging data; 3) passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are adopted as floating vehicles, a road section mean velocity is obtained through using a speed-time integral model and a weighted average method; and 4) a support vector regression machine fusion algorithm is adopted to fuse the two road section mean velocities, so that a support vector regression machine fusion-based expressway road section mean velocity can be obtained. According to the support vector regression machine fusion-based expressway road section mean velocity estimation method of the invention, expressway road section fee charging data and Beidou satellite positioning system data about the passenger service vehicles and hazardous article transport vehicles of which the single operating mileage exceeds 800 kilometers are combined, the fused road section mean velocity is obtained through the support vector regression machine method, and therefore, the accuracy of velocity estimation is improved, the daily monitoring and emergency disposal of expressway managers can be benefitted, and the operational efficiency of expressways can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of expressway management, in particular to a method for estimating the average speed of expressway sections fused with a support vector regression machine. Background technique [0002] The average speed of an expressway section refers to the average travel speed of traffic vehicles passing through a section of an expressway in a specified direction within a unit time period. The average speed of the road section can intuitively reflect the actual operation status of the expressway section, which is of great significance to the travelers and the management department of the expressway. At present, the method of obtaining the average speed of expressway sections in my country is mainly the fixed acquisition method, that is, the average speed of vehicles passing through the section is directly obtained by using vehicle detectors, high-definition cameras and other equipment deployed on the expressway. However, ...

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Problems solved by technology

[0005] The purpose of the present invention is to make up for the defect that the estimated average speed of the road section is not high due to the sparse density and high damage rate of the existing expressway vehicle detectors, and proposes an estimation of the average speed of the expressway section fused with a support vector regression machine method

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