Variable lane signal control method based on multi-traffic index

Abstract

The invention provides a variable lane signal control method based on a multi-traffic index. By acquiring real-time traffic data and signal control data, the queuing length of a green light starting moment, the queuing length of a green light ending moment, the green light duration and traffic characteristic data of the saturation during the green light are obtained; and when the obtained trafficcharacteristic data reach the respective threshold condition and a variable lane guide attribute switching interval meets a prescribed interval duration, the variable lane guidance triggers a switching request signal, evaluates the influence of the variable lane guidance attribute switching on the traffic pressure before and after the switching, and determines whether to perform the variable laneguidance attribute switching. By applying the variable lane signal control method provided by the invention, the problem that real traffic adjustment requirements cannot be accurately reflected by a single index can be avoided, the influence of the lane guidance adjustment on the traffic flow operation is evaluated in advance, manual and automatic switching of the lane guidance attribute is supported, the method is more in line with an actual traffic operation rule, the lane operation efficiency of intersections is improved, and the overflow and confusion risks caused by queuing is reduced.

Description

technical field [0001] The invention relates to the technical field of traffic information, in particular to a variable lane signal control method based on multiple traffic indicators. Background technique [0002] In the field of traffic engineering, a variable lane is defined as a lane that can be manually or automatically changed according to different directions of flow and traffic control requirements. Manual switching refers to the method of switching the variable guidance lane indicator signs at regular intervals according to the preset scheme, and then changing the lane guidance. Adaptive switching refers to the method of automatically changing the direction of variable lanes by judging the corresponding switching direction and sequence according to the change of flow direction of the entrance lane. [0003] At present, the traffic flow of my country's urban arterial roads changes frequently, and the phenomenon of time-segment asymmetry is obvious, and the demand fo...

AI Technical Summary

Problems solved by technology

[0005] 1. Low degree of automation control

[0006] Full manual control or simple automatic switching based on single index trigger, response lag and low controllability

[0007] 2. The switching smoothness is low

[0008] The transition of existing vehicles in the variable lane and the smooth connection between manual mode and automatic mode are not fully considered, the switching mechanism is too rigid and there are too few safety guarantees during the switching period

[0009] 3. Lack of data evaluation for switching basis and switching effect

[0010] The conditions for switching triggers are only manually calibrated period divisions, which do not match the changes in actual traffic flow. The switching effect evaluation system and data are not perfect, and there is a large risk of negative effects in the switching operation

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