A traffic state assessment method and system based on road network topology

Abstract

The invention discloses a traffic state assessment method and system based on a road network topology structure, which belongs to the technical field of traffic state assessment, and solves the problem that the traffic flow data of a certain road section cannot be obtained for a period of time and the traffic state of the road section cannot be assessed. . A traffic state assessment method based on road network topology structure, when the road segment is a road segment for which the current flow value cannot be obtained, the following steps are performed: according to the flow value of the upstream road segment or the flow value of the downstream road segment, determine the weight coefficient between the target road segment and the upstream road segment , or the weight coefficient between the target road section and the downstream section; according to the weight coefficient between the target road section and the upstream section, or the weight coefficient between the target road section and the downstream section, and the current flow value of the upstream section or downstream section of the target road section, determine the target The current flow value of the road section; according to the current flow value of the target road section, the traffic congestion state of the road section is determined. It realizes the evaluation of the traffic status of the road section for which the current flow value cannot be obtained.

Description

technical field [0001] The invention relates to the technical field of traffic state assessment, in particular to a traffic state assessment method based on a road network topology structure. Background technique [0002] In recent years, with the rapid development of intelligent control and management technology of urban road network, traffic status assessment has become an important means of traffic management in many large and medium-sized cities. However, due to the construction and renovation of urban roads and urban infrastructure, the Under the circumstance that the road traffic detector fails and the traffic flow data of a certain road section is missing for a period of time and thus cannot be obtained (meaning that it cannot be obtained directly), a technical solution is urgently needed to determine the unobtainable traffic flow data to assess the current situation. The traffic status of the road sections for which the flow value cannot be obtained makes the assessm...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of urban road network intelligent control and management technology, traffic status assessment has become an important means of traffic management in many large and medium-sized cities, but due to the construction and renovation of urban roads and urban infrastructure, it will lead to real In the case of a road traffic detector failure, the traffic flow data of a certain road section is missing for a period of time and thus cannot be obtained (meaning that it cannot be directly obtained). A technical solution is urgently needed to determine this unobtainable traffic flow data to evaluate the current The traffic status of the road section where the flow value cannot be obtained makes the assessment of the traffic status of the entire road network accurate and comprehensive, thereby improving the comprehensiveness and universality of urban road network management and control

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