A Calculation Method of Intersection Congestion Index Based on Forward Radar Data

Abstract

The invention discloses a calculation method of intersection congestion index based on forward radar data, as follows: classify the intersection state according to the degree of congestion; draw the actual characteristic curve of headway, and set the threshold value of headway; The actual characteristic curve of the required time, and set the full time threshold after the green light; the first identification of the intersection state; the calculation model of the three states of the intersection; the second identification of the intersection state; Basic unblocked state calculation model, mild congestion state calculation model, moderate congestion state calculation model, and severe congestion state calculation model. The method of the present invention counts and analyzes the average headway and the time required for a full line after a green light, and proposes an intersection-level congestion index segmentation calculation model according to the respective characteristics of the two data, which is more suitable for the traffic state of the intersection itself.

Description

technical field [0001] The invention belongs to the technical field of traffic data processing, and specifically refers to a method for calculating an intersection congestion index based on forward radar data. Background technique [0002] With the continuous growth of the number of motor vehicles in the city, traffic congestion occurs from time to time. Identifying the state of the intersection in time is a necessary requirement for benefit evaluation and a prerequisite for intelligent control. At the same time, with the update and iteration of forward radar detection equipment, it is possible to mine more traffic parameters based on the original detection data. How to fully use the detection data to describe the traffic operation status of the intersection more accurately has become an urgent problem to be solved. [0003] The current congestion index calculation method is basically proposed for road sections, and lacks the index evaluation at the intersection level. Mo...

AI Technical Summary

Problems solved by technology

However, the existing traffic parameters in these industries may have the same value in different intersection states, and no available traffic parameters have been found to be positively or negatively correlated with the degree of intersection congestion, so it is impossible to directly use a single parameter to represent the intersection congestion index

In addition, some intersection congestion index calculation methods use the method of averaging multiple parameters. Simple average processing cannot solve the problem that the traffic parameters themselves are not positively or negatively correlated with the intersection state, and also ignores the characteristic correlation analysis of various traffic parameters.

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