Traffic survey data and track data fused flow distribution method and system

Abstract

The invention discloses a traffic survey data and track data fused flow distribution method and system, and the method comprises the steps of firstly carrying out the preprocessing of an urban road network, constructing a road network topological relation, and coding each road segment; matching the preprocessed track points to a road network to form travel tracks and construct a track set; matching the survey positions with the road network, and then sorting to construct a survey position set; determining a mutual association relationship between the survey position and the track through the road segment; calculating a track sample expansion coefficient and assigning the track sample expansion coefficient to a corresponding track; summarizing sample expansion coefficient values of related survey positions and updating residual flow; carrying out iterative calculation until flow or tracks of all survey positions are distributed; and gathering the track coefficients to the road segment to obtain the distributed traffic flow. According to the invention, the statistical range of the traffic flow extends from the independent survey position to the whole road network, and the route covered by the traffic flow is improved.

Description

technical field [0001] The invention relates to the field of urban intelligent traffic, which is the specific application of new generation information technology in urban traffic planning, construction and management, and specifically relates to a traffic distribution method and system for merging traffic survey data and track data. Background technique [0002] In the evaluation of urban road traffic, traffic flow is one of the important parameters to describe the operation status. Its scale and changes reflect the basic characteristics of urban traffic flow, and can provide data support for urban traffic planning research, road design and traffic management policy formulation , which plays an important role in traffic operation analysis research. [0003] Urban road flow data is generally obtained through traffic flow surveys or coil bayonet detection equipment. Among them, traffic flow surveys have the advantage of high precision, but because each survey location needs t...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing traffic flow survey cannot realize the coverage of the whole road network, and provide a traffic distribution method and system for the fusion of traffic survey data and trajectory data, which can be estimated by matching the survey location data and the operating vehicle trajectory data. Calculate the traffic flow of road sections without traffic survey, expand from independent survey points to the whole road network, improve the coverage and application value of traffic survey data, and provide data support for urban traffic planning research, road design and traffic management policy formulation

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