A method for obtaining fast path od matrix based on multi-source data

Abstract

The invention discloses an expressway OD matrix acquisition method based on multi-source data. By processing multi-source data represented by bayonet data, mobile phone data and floating car data, combined with the traffic characteristics of urban expressways, an optimization based on steering ratio is constructed. A route flow estimation model based on AVI / GSM / GPS multi-source data is constructed, and the relative error between the traffic flow of the checkpoint monitoring section and the checkpoint monitoring data is the smallest, and the relative error of the road section flow multiplied by the left turn ratio of the diversion point and the left-traveling path flow of the intersection diversion point is the smallest. As the objective function, constraints are constructed by introducing the concept of cellular grid and cellular path flow, and the OD matrix is ​​derived from the estimated path flow. This estimation method has strong operability, and the estimated more accurate expressway OD traffic volume has very important theoretical value and practical significance for implementing corresponding traffic management and control methods to further improve urban traffic safety and efficiency.

Description

technical field [0001] The invention belongs to the field of urban traffic planning, and in particular relates to a method for obtaining an expressway OD matrix based on multi-source data. Background technique [0002] The urban expressway has the characteristics of one-way multi-lane, central separation belt, all three-dimensional intersections, ensuring continuous driving and large traffic capacity, which can improve the accessibility of urban traffic as a whole. important measure for congestion. Accurately obtaining the traffic OD of the expressway network is of great significance to the efficient management of urban expressways, improving the capacity of expressways, alleviating traffic congestion and promoting economic development. [0003] At present, the acquisition of the expressway OD matrix mainly relies on the bayonet data, but due to the insufficient coverage of the bayonet data itself, the accuracy of the estimated OD matrix will be affected. Although in recen...

AI Technical Summary

Problems solved by technology

[0003] At present, the acquisition of expressway OD matrix mainly depends on the checkpoint data, but due to the insufficient coverage of the checkpoint data itself, it will affect the accuracy of estimating the OD matrix

Although in recent years there has been a method to estimate the OD matrix using cell phone signaling data, it is often limited to using the obtained cellular path traffic as a constraint. The mobile phone signaling data itself is cleaned and denoised, or the accuracy of the matching between the travel endpoint and the traffic area is improved, but these methods are still limited to the single data source of the mobile phone signaling data, and the results have great limitations

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