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Method for determining traffic state of urban intersection

A judging method and technology for traffic status, which are applied in the direction of road vehicle traffic control system, traffic flow detection, traffic control system, etc., can solve problems such as difficulty in taking effect, difficulty, and complex intersection signal control, and achieve easier implementation and universal application. effect of sexual realization

Inactive Publication Date: 2019-04-02
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

However, the natural macro-regularity, micro-fluctuation, and randomness of urban road traffic make the intersection signal control complicated and difficult to take effect.
Especially in adapting to micro-fluctuation and randomness, it is even more difficult

Method used

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  • Method for determining traffic state of urban intersection
  • Method for determining traffic state of urban intersection
  • Method for determining traffic state of urban intersection

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Embodiment Construction

[0037] exist figure 1 In , it is described that with the increase of the queuing length at the intersection, the passing rate starts to decline from the maximum value, and the blocking rate starts to rise from 0. The intersection of the two curves is at the key length of the queuing. At this time, the controllable state index R= 0. On the left side of the point, the passing rate is greater than the blocking rate, and the intersection is in a controllable state; on the right side of the point, the passing rate is smaller than the blocking rate, and the intersection is in an uncontrollable state.

[0038] exist figure 2 In , the nonlinear relationship between traffic flow and density of urban road intersections is described, where the highest point of the parabola corresponds to the maximum flow and optimal density of the intersection, and the trend is that the flow increases with the increase of density. When the optimal density is exceeded As the density increases the flow d...

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Abstract

The invention provides a method for determining a traffic state of an urban intersection. Starting from a traffic wave theory, the method refinedly redefines the boundary of traffic states at an intersection by introducing the concepts of a passing rate, a traffic jam rate, and comprehensive action results, and solves the roughness of the current traffic state discriminant indicators of various intersections. In addition, the method provides a systematic, complete and implementable technical solution from concept description, theoretical characterization and method proposal.

Description

technical field [0001] The invention belongs to the field of urban road intersection control, in particular to a method for describing the traffic state of the road intersection, which is a controllable description method for the state of the urban road intersection. Background technique [0002] With the continuous increase of car ownership, urban road congestion is becoming more and more serious. As an important part of urban traffic transfer and safe passage, road intersections are gradually becoming the origin and hardest hit areas of traffic congestion. However, urban road traffic naturally has the characteristics of macroscopic regularity, microscopic volatility and randomness, which make the intersection signal control complicated and difficult to take effect. Especially in adapting to micro volatility and randomness, it is even more difficult. To this end, accurately defining and describing the state of intersections has become the primary condition for implementin...

Claims

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Application Information

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IPC IPC(8): G08G1/01
CPCG08G1/0133G08G1/0145
Inventor 张立立王力张海波何忠贺
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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