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Coordinated guidance control method for highway ramps under traffic events

A technology for highways and traffic incidents, applied in traffic control systems, road vehicle traffic control systems, traffic signal control, etc., can solve problems such as deterioration of the traffic environment and reduction of the overall efficiency of road network traffic

Active Publication Date: 2019-03-01
NANJING LOPU CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the congested road section is not controlled in time, the continuous impact of upstream vehicles will lead to the deterioration of the traffic environment and reduce the overall benefit of road network traffic

Method used

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  • Coordinated guidance control method for highway ramps under traffic events
  • Coordinated guidance control method for highway ramps under traffic events
  • Coordinated guidance control method for highway ramps under traffic events

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Such as figure 1 Shown is the simulated road network modeling of the present invention based on the coordinated decoy control method of the expressway ramp under the traffic event, the road network mainly consists of a one-way three-lane trunk line with a length of about 4400 meters, four entrance ramps, and two exits Road and so on.

[0021] Such as figure 2 As shown, the 7-vehicle rear-end collision event was simulated by VISSIM, which occurred about 3000 meters downstream of the main road. The improved Bottleneck control method is:

[0022] (1) After a traffic incident occurs, obtain the congestion influence range (the traffic bottleneck area between the upstream detection section and the downstream detection section) by calculating the queue length (traffic wave front), and determine the number n of ramps that need to be coordinated;

[0...

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Abstract

The invention discloses a coordinated guidance control method for highway ramps under traffic events, and belongs to the technical field of traffic control. The method includes: (1) obtaining an influence range of a traffic wave during a traffic event time period by using a queuing detector in a VISSIM; (2) determining the number of ramps used for coordinated control according to a ramp number ofa highway and the influence range of the traffic wave; and (3) obtaining the optimal ramp regulation rate by using the combination of a single point and a coordination level and providing path guidance, wherein the density is selected as a control variable at the coordination level, the coordination regulation rate is calculated through a PID control method, and vehicles are diverted to respectiveramps upstream of a congested point according to the weights of reducing inflows. The method uses the combination of an improved Bottleneck control method and a path guidance method based on journeyevents and shows that the vehicle delay at a trunk road can be greatly reduced and the adjustment efficiency is accelerated based on a VISSIM simulation result.

Description

technical field [0001] The invention belongs to the technical field of traffic control, in particular to a coordinated decoy control method for expressway ramps under traffic events. Background technique [0002] With the growth of the number of vehicles on the expressway, road congestion continues to appear. When the road is congested, it will form a road bottleneck and cause serious vehicle delays. If the congested road section is not controlled in time, the continuous impact of upstream vehicles will lead to the deterioration of the traffic environment and reduce the overall benefit of road network traffic. Alleviating traffic congestion and improving operational efficiency and safety have become practical problems that need to be solved urgently. Research shows that ramp control is the most widely used and most effective form of control to alleviate expressway congestion. It refers to the use of ramp signal lights to adjust the flow rate of vehicles entering the main l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/07G08G1/08
CPCG08G1/075G08G1/08
Inventor 徐伟敏郝兴峰费赛男徐腾飞王新
Owner NANJING LOPU CO LTD
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