Global state prediction method of three-dimensional urban traffic road network in big data environment

Abstract

A three-dimensional urban traffic road network global state prediction method under a large data environment is disclosed. Aiming at a coupling multi-layer large-scale urban traffic road network, a global traffic mode containing coupling information is defined, a method of extracting a main road network characteristic is provided, a high dimension state time sequence is converted into a discrete state type sequence, and difficulties of high dimension data in processing and prediction aspects are simplified. From aspects of traffic periodicity, delay performance and other characteristics, a historical state transfer information database containing a multielement traffic characteristic is constructed, mass data information and a data driving idea are fully used and a Markov transition probability theory is applied so as to realize multi-step global traffic state prediction. Through the global traffic prediction, a traffic state of each area can be acquired one time. Compared to an existing traffic prediction method, by using the method of the invention, a long-term prediction result is acquired rapidly and a good prediction output effect is possessed.

Description

technical field [0001] The invention relates to the field of urban traffic road network traffic state prediction, in particular to a method for predicting the overall state of a three-dimensional urban traffic road network in a big data environment. Background technique [0002] Urban traffic status can not only affect personal travel experience, but also an important indicator of healthy urban development. The realization of urban intelligent transportation system (Intelligent Transportation System) can improve the efficiency of traffic operation, improve the quality of urban environment, and improve the quality of life of citizens. Therefore, intelligent transportation is the long-term focus of relevant researchers and urban management departments. Accurate and reliable traffic state definition and prediction provide the core foundation for intelligent transportation systems. [0003] After searching the literature of the prior art, it was found that early researchers use...

AI Technical Summary

Problems solved by technology

Most of the current research methods only consider a single road section or intersection when predicting, and do not incorporate the correlation between traffic elements into the prediction method.

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