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Smooth transition method of intersection signal timing scheme under multi-time timing control

A smooth transition and timing control technology, applied in traffic control systems, traffic control systems of road vehicles, instruments, etc., to achieve fast and smooth transition, maintain stable operation, and improve real-time performance

Active Publication Date: 2019-06-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the smooth transition method of the existing intersection signal timing scheme is only applicable to the coordinated control of each intersection in adjacent periods, and proposes a smooth transition of the intersection signal timing scheme under multi-period timing control method

Method used

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  • Smooth transition method of intersection signal timing scheme under multi-time timing control
  • Smooth transition method of intersection signal timing scheme under multi-time timing control
  • Smooth transition method of intersection signal timing scheme under multi-time timing control

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Experimental program
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specific Embodiment approach 1

[0022] Specific implementation mode 1: The specific process of the smooth transition method of the intersection signal timing scheme under multi-period timing control in this implementation mode is as follows:

[0023] Step 1. Divide the smooth transition of signal timing schemes at multi-period timing control intersections into four types:

[0024] Type 1: In time period i and time period i+1, all the intersections involved are under single-point control;

[0025] Type 2: In time period i and time period i+1, all intersections involved are performing coordinated control;

[0026] Type 3: Single-point control is implemented at some intersections involved in period i, and coordinated control is implemented at other intersections; while coordinated control is implemented at all intersections in period i+1;

[0027] Type 4: Single-point control is implemented at some intersections involved in period i, and coordinated control is implemented at the remaining intersections; and si...

specific Embodiment approach 2

[0036] Specific implementation mode two: the difference between this implementation mode and the first implementation mode is that the smooth transition scheme of the intersection of the following type is determined in the step three; the specific process is:

[0037] Step 31. Let J equal to 1, where J is the number of intersections involved in period i or period i+1;

[0038] Step 32: Calculate the cycle duration of the intersection ρ in period i and the cycle duration at period i+1 the absolute value of the difference

[0039] Step three three, if Then, after the period i ends, the intersection ρ does not need to implement a smooth transition plan (suggested σ=30), and turns to step 3 and 5; otherwise, turns to step 3 and 4; σ is the threshold;

[0040] Step 3 and 4: After the period i ends, the intersection ρ needs to implement a smooth transition plan for one cycle;

[0041] The smooth transition scheme includes: the start time of the smooth transition scheme, the...

specific Embodiment approach 3

[0048] Specific implementation mode three: the difference between this implementation mode and the first or second implementation mode is: the start execution time of the smooth transition scheme in the step three or four The expression is:

[0049]

[0050] in: is the phase H of the running cycle of intersection ρ at the end of period i ρ (hereinafter referred to as "the end moment of the running cycle of intersection ρ at the end of period i") (for example, phase 1 is going straight north-south, phase 2 is turning north-south left, and the end time of the green light interval of phase 1 refers to The length of time between the end of the green light of phase 1 and the start of the green light of phase 2); H ρ is the phase number of intersection ρ;

[0051] Period duration of intersection ρ during smooth transition The expression is:

[0052]

[0053] Green time of phase h at intersection ρ during smooth transition The expression is:

[0054]

[0055] in: ...

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Abstract

The invention, which relates to the field of the intersection signal timing scheme, provides a smooth transition method of an intersection signal timing scheme under multi-time timing control, therebysolving a problem that the existing smooth transition method of the intersection signal timing scheme is only suitable for coordinated controlling of all intersections in adjacent periods of time. The method comprises: step one, dividing smooth transition of a signal timing scheme of multi-time timing intersection control into four types; step two, determining a smooth transition type of the intersection after ending of the ith period of time; performing the step three under the condition of belonging to the type I; performing the step four under the condition of belonging to the type II or type III; performing the step five under the condition of belonging to the type IV; step three, determining an intersection smooth transition scheme under the type I; step four, determining an intersection smooth transition scheme under the type II or type III; and step five, determining an intersection smooth transition scheme under the type IV. The method belongs to the technical field of urban traffic control.

Description

technical field [0001] The invention relates to an intersection signal timing scheme. Background technique [0002] Timing control is the most widely used traffic control method in urban signalized intersections in my country. In this control mode, there is no traffic flow detector at the intersection, so the running status of traffic flow cannot be obtained. In order to improve control efficiency, traffic managers generally divide 24 hours a day into multiple control periods according to the changing characteristics of traffic flow parameters obtained through manual investigation, and different control periods implement different signal timing schemes. When the signal timing schemes of two adjacent control periods are quite different, it is necessary to implement a smooth transition of the signal timing schemes to maintain the smoothness and continuity of traffic flow. That is, after the operation of the signal timing scheme of period i is completed, the smooth transition...

Claims

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Application Information

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IPC IPC(8): G08G1/081
Inventor 王贺祺别一鸣吴立昱汪金伶郝明杰季金华邱泓王府泉
Owner JILIN UNIV
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