Traffic flow running rate recognizing method based on bus GPS data

Abstract

The invention discloses a traffic flow running rate recognizing method based on bus GPS data and relates to a traffic information collecting and processing technology in the field of intelligent traffics. The method comprises the following solving steps of: carrying out grade division on an urban road section by a GIS; confirming a speed threshold value K1 and a speed threshold value K2 of all grades of roads; carrying out sub-road section division on the urban roads by the GIS; obtaining an average value of the speed that all buses pass through a sub-road section in a certain time interval, which is collected by a bus vehicle-mounted GPS system; comparing the average value of the speed with the threshold value K1 and the threshold value K2 of the sub-road section and confirming the traffic flow running rate of the sub-road section. The traffic flow running rate recognizing method based on bus GPS data can obviously improve the recognizing precision of the traffic flow running rate, reduce the time delay and provide the type of traffic jam simultaneously, thereby providing a basis for selecting more convenient traveling line for a traveler and proving more powerful decision support for establishing a jam facilitating scheme for a traffic management department.

Description

technical field [0001] The invention relates to traffic information collection and processing technology in the field of intelligent traffic, in particular to a traffic flow running state recognition method based on bus GPS data. Background technique [0002] Accompanied by traffic congestion, a series of problems such as increased travel delays, increased fuel consumption, frequent traffic accidents, and deteriorating environmental quality have seriously affected the coordinated development of cities and people's daily lives. Obtaining accurate, real-time, and sufficient dynamic traffic information to identify traffic congestion that has occurred or is about to occur in the road network, and at the same time give the nature of traffic congestion is of great significance for formulating reasonable and effective congestion relief strategies. Because the operation mechanism of the bus has strong temporal and spatial stability, it is easy to find the abnormal operation state of...

AI Technical Summary

Problems solved by technology

[0003] At present, the research status and main problems of the identification method of traffic flow operation status based on bus GPS data can be summarized as follows: China's "Urban Road Traffic Management Evaluation Index System" only stipulates the use of travel speed to evaluate the traffic flow of urban arterial roads. It does not involve the evaluation criteria of other grades of road traffic flow operation status; it is usually considered that the travel speed of the bus section is the travel speed of the traffic flow section, and does not fully consider the differences in the operating characteristics of different types of vehicles; usually the bus The location of the adjacent intersection or the location of the adjacent bus station is used as the boundary to divide the road section, without considering factors such as the length of the road section, the change of the road alignment, and the change of the road function; it is usually assumed that the bus passes the boundary of the road section at a constant speed, so as to estimate the travel speed of the bicycle section, without consideration Unstability of vehicle running speed on urban roads; it is usually assumed that buses pass through the bus stop continuously to estimate the travel speed of the road section, ignoring the influence of the bus parking service time on the obtained results of the average travel speed of the road section; usually only the traffic flow operation status is output types without performing the necessary analysis on the reliability of the recognition results

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