City signalized intersection optimal vehicle speed guiding algorithm and system based on vehicle-road cooperation

A vehicle speed guidance and intersection technology, applied in the field of intelligent transportation, can solve the problems of vehicle speed guidance failure, difficulty in solving, affecting vehicles, etc., and achieve the effect of reducing restrictive conditions

Active Publication Date: 2017-06-13
SOUTHEAST UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

This guidance method requires each vehicle to reach the stop line within the expected time. If one vehicle deviates, it will affect the following vehicles, resulting in failure of vehicle speed guidance.
The linear programming model used in it has fewer considerations and is not easy to solve

Method used

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  • City signalized intersection optimal vehicle speed guiding algorithm and system based on vehicle-road cooperation
  • City signalized intersection optimal vehicle speed guiding algorithm and system based on vehicle-road cooperation
  • City signalized intersection optimal vehicle speed guiding algorithm and system based on vehicle-road cooperation

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Embodiment Construction

[0039] Such as figure 1 Shown is the flow chart of the optimal speed guidance algorithm for urban signalized intersections disclosed in the embodiment of the present invention. Pass through the intersection within the signal light cycle. If it is impossible to pass, guide the vehicle to stop at the end of the queue at an economical speed; if it is possible to pass the intersection, then judge whether it is necessary to guide the vehicle and the vehicle in front to pass in the form of a convoy, if not, then guide the vehicle to pass as soon as possible, if necessary When the form of a convoy passes through the intersection, the vehicles are guided to the stop line when the queue dissipates. After the above process is judged, the guide vehicle speed is calculated respectively.

[0040] Such as figure 2 Shown is the hardware implementation block diagram of the vehicle speed guidance system of the present invention, the optimal vehicle speed guidance system disclosed by the em...

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Abstract

The invention discloses a city signalized intersection optimal vehicle speed guiding algorithm and system based on vehicle-road cooperation. The optimal vehicle speed guiding algorithm does not comprise basic assumptions that overtaking and lane changing of vehicles are not allowed, and all the vehicles abide by vehicle speed guiding in previous studies, calculation is continuously conducted according to the current positions of the vehicles by means of real-time refreshing of the vehicle speed guiding system, and the limiting conditions of a model is reduced. Meanwhile, the influence generated by the fact the vehicle speed is low when the vehicles turn in the actual driving process is taken into account, and the influences generated by the speed reducing process when the left-turning vehicles and the right-turning vehicles reach the stop line and the fact that the speed is lower than the straight going speed when the queue clearance vehicles pass through the stop line are taken into account in calculation. In the system, design and development of the vehicle speed guiding system from a theoretical model to real equipment are completed, a mature and economic scheme which is feasible under the current actual conditions is proposed, and a basic vehicle-road cooperation function can be achieved at low cost.

Description

technical field [0001] The invention relates to an optimal vehicle speed guidance algorithm and a vehicle speed guidance system at urban signalized intersections based on vehicle-road coordination, and belongs to the technical field of intelligent transportation. Background technique [0002] With the continuous improvement of people's living standards, the penetration rate of vehicles is also increasing. According to statistics from the Traffic Management Bureau of the Ministry of Public Security, as of the end of 2016, the number of motor vehicles nationwide reached 290 million, including 194 million cars; there were 360 ​​million motor vehicle drivers, including more than 310 million car drivers. The sharp increase of motor vehicles has brought enormous pressure to road traffic. Due to the great uncertainty of the driver's driving behavior, the blind choice of vehicle speed makes the road resources that are not abundant in the first place unable to be used efficiently. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/07
CPCG08G1/07
Inventor 刘诚恺李林泽
Owner SOUTHEAST UNIV
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