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Highway optimization control method

A technology for highway and optimal control, which is applied to the traffic control system, traffic control system, instruments and other directions of road vehicles, and can solve the problems of slow calculation speed, complex control method and poor control effect.

Inactive Publication Date: 2012-02-22
ZHEJIANG INST OF COMM
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  • Description
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Problems solved by technology

[0005] In order to overcome the problems that existing expressway optimization control models and control methods are too complex, resulting in slow calculation speed and poor control effect, the present invention provides an expressway optimization algorithm with simplified control algorithm, fast calculation speed and optimized control effect. Control Method

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with the accompanying drawings.

[0057] refer to Figure 1 to Figure 9 , an expressway optimization control method, comprising the following steps:

[0058] 1) Establish a multi-ramp joint control optimization model of the expressway, divide a section of the expressway into N sections, each section contains at most one on-ramp and one off-ramp, and perform optimal control modeling for each section.

[0059] Further, in the step 1), a time-space discrete traffic flow model is selected to describe the expressway partitions, which can more accurately describe the dynamic changes of the average density and speed of expressway traffic flow, including the transition from smooth traffic to congested The process of transition from traffic and congested traffic to smooth traffic, the model description is shown in formulas (1)-(4):

[0060] ρ i ( ...

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Abstract

The invention provides a highway optimization control method which comprises the following steps of: (1) dividing a section of highway into N intervals, and selecting a space-time discrete traffic flow model to represent the intervals of the highway, wherein each interval contains an entrance ramp and an exit ramp; (2) determining the regulation rate of each ramp by setting a highway multi-ramp combination control optimization target with maximal total flow of services and shortest mean waiting time of vehicles at each entrance ramp; (3) solving the highway multi-ramp combination control optimization model by adopting an ant colony algorithm; and (4) obtaining the optimal regulation rate of each entrance ramp in each section interval by the step (3), and regulating the traffic flow of each entrance ramp in each section interval according to the calculation results. Through the invention, a control algorithm is simplified, the calculation speed is high, and the control effect is optimized.

Description

technical field [0001] The present invention relates to the fields of traffic control information processing and computer application, and in particular relates to an optimal control method for expressways. Background technique [0002] Expressway is the main artery of inter-city traffic, and it is a special road for continuous and rapid driving of automobiles, serving large-capacity, long-distance, and rapid traffic. However, with the rapid increase in the number of motor vehicles, the traffic density on the highway during the peak period is increasing, and the traffic congestion is gradually aggravating. During peak hours, traffic speeds on some sections of the road are below 40 km / h. [0003] In order to improve the traffic operation efficiency of the expressway and alleviate or avoid traffic congestion, the on-ramp control method is often used to regulate the vehicles entering the expressway. However, with the improvement of the overall operating efficiency of the expr...

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Application Information

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IPC IPC(8): G08G1/00G08G1/065
CPCY02T10/40
Inventor 张乐飞朱炯杨洁郭海锋赵俊波张秀华
Owner ZHEJIANG INST OF COMM
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