A traffic distribution method and system based on fusion of traffic survey data and trajectory data

Abstract

The invention discloses a traffic distribution method and system for merging traffic survey data and trajectory data. Firstly, the urban road network is preprocessed, the topological relationship of the road network is constructed, and each road section is encoded; the preprocessed trajectory points are matched to the road The network forms travel trajectories to construct a trajectory set; the survey locations are matched with the road network and then sorted to construct a survey location set; the correlation between the survey locations and trajectories is determined through road sections; the trajectory expansion coefficient is calculated and assigned to the corresponding trajectory; summary Sampling coefficient value of the relevant investigation location and update the remaining flow; iterative calculation until all the investigation location flow or trajectory is allocated; the trajectory coefficient is aggregated to the road section to obtain the allocated traffic flow. The invention realizes that the statistical scope of the traffic flow extends from the independent investigation position to the whole road network, and improves the lines covered by the traffic flow.

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 trajectory 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 ne...

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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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