A method for controlling traffic lights

A traffic signal light and control method technology, applied in the field of real-time traffic signal light control, can solve the problems of inability to distinguish the change of traffic congestion status, inability to predict traffic congestion, etc., and achieve the effect of improving notification ability, preventing congestion, and delaying congestion.

Active Publication Date: 2019-09-06
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing traffic control system cannot judge the traffic state changes before the congestion occurs, and cannot detect this trend before the congestion occurs and change the traffic control plan to avoid the occurrence and spread of local congestion.
This is why existing traffic control systems cannot predict traffic congestion and change signal lights in advance to alleviate congestion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for controlling traffic lights
  • A method for controlling traffic lights
  • A method for controlling traffic lights

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0012] This embodiment uses a main road in a city center as an example to illustrate the control method. There are 9 road sections and 8 intersections in the road section. The east is the suburbs and the west is the urban area. This case simulates this from 6 am to 10 am Time period, the traffic operation from the suburbs to the urban area, such as figure 1 As shown, link is a road section, and DCP is a detector set in the simulation software (note: this embodiment is tested in the form of simulation, as follows).

[0013] When a group of vehicles travel to the arterial section, the floating vehicles will collect data such as the average travel time of these vehicles, and divide these vehicles into parking groups and non-parking groups. Through the collected average travel time data, the proportion p of vehicles in the non-parking group can be calculated, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a traffic signal lamp control method. The method includes following steps: S1, performing initialization: adjusting the green light time of all road segments as a set value; S2, obtaining a non-stopped group proportion: obtaining a non-stopped group proportion p' of the previous period and a non-stopped group proportion p of this period of each road segment by employing probe vehicle data; S3, determining the importance degree c of each road segment: determining the importance degree c of each road segment according to the non-stopped group proportion p' of the previous period and the non-stopped group proportion p of this period and the change conditions thereof; S4, calculating the optimized green light time of each intersection by employing the importance degree c of each road segment according to a set linear programming method; and S5, performing circulated optimization: repeating steps S2 to S5, and continuously obtaining the optimized green light time. According to the method, traffic jam can be predicted so that signal lamps can be changed in advance, the jam is alleviated, the jam is postponed, and the passing capability of roads is improved.

Description

Technical field [0001] The invention relates to a traffic signal lamp control method, in particular to real-time traffic signal lamp control. Background technique [0002] Signal control is mainly divided into fixed timing signal control and adaptive signal control. Most cities in our country now use the fixed timing method, but its flexibility and adaptability are relatively low. Because the traffic state changes in real time, the fixed timing method cannot respond to changes in traffic conditions in a timely and effective manner. This has caused traffic congestion and other problems. The adaptive signal control method will adjust the parameters of the signal in real time according to the changes of the road. It is a signal control method that can be adaptive when the traffic flow of the intersection changes. [0003] There are many adaptive control methods, the most famous of which is the SCOOT system (Split-Cycle-Offset Optimization Technique) developed by the British TRRL, wh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): G08G1/081G08G1/01
Inventor张凯连福诗陈博奎
OwnerSHENZHEN GRADUATE SCHOOL TSINGHUA UNIV