A method for generating road condition information based on bus GPS track data

Abstract

The invention discloses a method for generating road condition information based on bus GPS trajectory data, comprising: step 1, in the bus road network data structure, the actual bus stops, station points, line intersections and intersection nodes are all represented by nodes, Two adjacent nodes in the same direction on a road are connected by a line segment. The line segment is defined as a road segment, which is used to represent an actual road segment in one direction, and the driving direction of the road segment is used as the The associated attributes of road sections; Step 2, obtaining all GPS trajectory data of n buses within a certain period of time T; Step 3, matching all GPS trajectory data of n buses to the bus road network data structure; Step 4, The average speed of the h buses matched to the corresponding road segment is used as the road condition information of the actual road segment. The invention utilizes point elements and line elements to construct the data structure of the entire bus road network, which accurately reflects the road conditions of the road section.

Description

technical field [0001] The invention relates to the traffic field, in particular to a method for generating road condition information based on bus GPS trajectory data. Background technique [0002] In recent years, with the acceleration of urbanization and the increase of urban population, the number of motor vehicles and the number of residents traveling have increased significantly, the relationship between transportation supply and demand has gradually become unbalanced, and road congestion has become increasingly prominent. The development of intelligent transportation systems has long been a problem for countries around the world to deal with urban traffic problems. the main way. Among them, the research and application of intelligent public transportation system embodies the development concept of public transportation priority and green travel, and undertakes the important responsibility of improving the intelligent operation and dispatching ability of public transpo...

AI Technical Summary

Problems solved by technology

[0004] Ordinary road networks do not have a high degree of adaptability in bus system operation scheduling and road condition information processing. The bus lines are separated according to their respective stations, and multiple lines are stacked together, so the ambiguity at the edge of the overlapping road section introduces a large error in the process of calculating the road condition of the road section

like figure 1 As shown in the figure, if the end station is known as the route b of B, then the traffic conditions in the interval mB will be generated from the floating car data belonging to b, and its scope is only in mB. Calculating the road conditions of mn as mB road conditions in general will result in information accuracy a substantial reduction in

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