An Active Vehicle Scheduling Method at an Intersection

Abstract

The invention proposes an active type vehicle scheduling method at a crossroad. The method comprises the following steps: 1) monitoring the vehicle information; 2) according to the vehicle information, organizing vehicle queues; 3) consolidating the vehicle queues of the same phase; 4) constructing vehicle queue scheduling sequences; 5) obtaining the best vehicle queue scheduling sequence; 6) splitting the overlapped vehicle queues; 7) according to the splitting strategy, performing the active type vehicle scheduling; 8) performing wait-free active-type vehicle scheduling; and 9) executing a fixed time planning strategy. According to the invention, through the utilization of the establishment of a binary tree method for the construction of vehicle queue scheduling sequences, it is possible to search the sequence corresponding to the smallest travel time, and the efficiency is better than the one-by-one screening in the form of full permutation. With regard to the traffic scenario where wait-free passing cannot be realized, the invention proposes the method for splitting the overlapped vehicle queues. With the method, for the condition-meeting vehicle distribution, wait-free passing is possible and the shortest travel time can be obtained.

Description

technical field [0001] The invention belongs to the field of urban traffic signal control, and relates to a vehicle dispatching method, in particular to an active vehicle dispatching method at an intersection. Background technique [0002] Traffic signal control takes the microscopic traffic flow at the intersection as the control object, allocates the right of way of the vehicle at the intersection with the phase and time as the scale, separates the conflicting traffic flow from the time, and conducts reasonable guidance and scheduling of the traffic flow, so as to reduce traffic accidents and improve traffic safety. The purpose of traffic safety and transportation efficiency. [0003] Intersection signal control methods can be divided into two categories: active and passive. The so-called passive type means that vehicles pass through the intersection according to the phase and cycle duration of the intersection signal lights. This method artificially divides the continuou...

AI Technical Summary

Problems solved by technology

The SCATS system adjusts the signal control parameters in real time according to the traffic flow changes, but the number of options is limited, and it takes a long time to execute each plan (change every ten minutes), without feedback function, and the detection equipment is placed in front of the stop line. Unable to detect vehicle queue length

These two methods rely on geomagnetic and video detection equipment to obtain real-time traffic flow status and the traffic flow prediction model established therefrom. The detection accuracy and model prediction accuracy will affect the regulation of traffic flow by the intersection signal control system.

[0005] With the development of the Internet of Vehicles and intelligent networked vehicles, the installation of cameras on vehicles to detect changes in signal lights will not only increase the cost, but will also be affected by climate conditions. uploading, solves the problem of low detection accuracy of traditional methods and low accuracy of traffic flow prediction models, and at the same time, according to the vehicle state information that can be accurately obtained and according to different traffic efficiency indicators, an active traffic dispatching method based on the global optimal vehicle scheduling method at intersections is established. The method of traffic signal control will be an important challenge for intelligent networked vehicles to go to engineering applications

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