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Intersection signal control method

A technology of signal control and intersection, applied in the field of urban traffic management

Active Publication Date: 2018-04-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the intersection signal control methods are either fixed control or induction control, each with its own advantages and disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] by figure 2 The intersection shown is the research object, and a numerical example study is carried out.

[0052] Step 1: extract the maximum queuing length of each flow direction at the intersection from the historical database, and determine the intersection control area, wherein the intersection control area needs to cover the maximum queuing length of each flow direction.

[0053] Step 2: Extract the time-varying traffic flow data of each flow upstream of the intersection from the real-time database, and calculate the flow entering the intersection control area.

[0054] Step 3: Initialize the standard four-phase signal control scheme of the intersection, take C (0) = 115s.

[0055] Step 4: Take n=5, based on the cellular transport model, calculate the traffic flow of each flow direction of the intersection reaching the stop line within 5 control cycles, and calculate the traffic volume of each flow direction, as shown in Table 2.

[0056] Table 2 traffic volume...

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Abstract

The invention discloses an intersection signal control method, which belongs to the technical field of urban traffic management. The method includes the following steps: extracting the maximum queuinglength in each flow direction of an intersection from a historical database, and determining an intersection control area; extracting the time-variable traffic flow data of the upstream of each flowdirection of the intersection from a real-time database, and calculating the flow entering the intersection control area; initializing the signal control scheme of the intersection; calculating the traffic flow reaching the stop line in each flow direction of the intersection in n control cycles; solving a control cycle optimization model considering saturation and delay to calculate the control cycle; implementing a dynamic signal control decision model considering fairness to optimize the control scheme, and obtaining the signal control schemes of the n control cycles; if there is little cycle difference between two iterations, ending the process, and recording the best scheme; otherwise, continuing to calculate the traffic flow reaching the stop line in each flow direction of the intersection in the n control cycles, and carrying out iterative calculation.

Description

technical field [0001] The invention belongs to the technical field of urban traffic management, and in particular relates to an intersection signal control method, which not only guarantees the optimization generation of the control cycle, but also ensures the dynamic realization of the control scheme. Background technique [0002] Intersections have an important impact on traffic flow and are one of the important causes of urban traffic congestion. From the perspective of return on investment, traffic control is the most economical and effective means to solve congestion. At present, the intersection signal control methods are either fixed control or induction control, each with its own advantages and disadvantages. Period is the main control parameter of intersection signal control, which directly affects the operation efficiency of intersection. Fixed control generally starts from the optimization point of view and establishes a mathematical model to obtain the cycle d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 孙智源陈艳艳熊杰
Owner BEIJING UNIV OF TECH