Ramp afflux traffic control method and system based on traffic accident number estimation

A traffic accident and traffic control technology, which is applied in the traffic control system of road vehicles, traffic control system, traffic signal control, etc., can solve the problem of not considering the risk of traffic accidents, achieve the effect of reducing the risk of traffic accidents and improving traffic efficiency

Active Publication Date: 2022-01-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, although the existing method can improve the congestion problem caused by the ramp-in, it does not consider the ris

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  • Ramp afflux traffic control method and system based on traffic accident number estimation
  • Ramp afflux traffic control method and system based on traffic accident number estimation
  • Ramp afflux traffic control method and system based on traffic accident number estimation

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Embodiment Construction

[0052] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0053] refer to figure 1 Shown, a kind of ramp-in traffic control method based on traffic accident number estimation of the present invention, the steps are as follows:

[0054] 1) Divide the road into N sections along the road direction, each section has a length of L, and the number of lanes of the i-th section of the main road is λ i ; Divide the control time domain into K time steps, each time step is T, i=1,2,...,N;

[0055] 2) Establish the ramp-in traffic model DM; solve the traffic density ρ of each road section at the current moment i (0), the average traffic speed v i (0), ramp queue length l i (0), the upstream traffic flow of the ramp d i (0), and substitute the traffic stat...

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Abstract

The invention discloses a ramp afflux traffic control method and system based on traffic accident number estimation. The ramp afflux traffic control method comprises the steps: obtaining the state quantity at the current moment; establishing a ramp afflux traffic model; estimating the total number of possible accidents; calculating the total consumed time; establishing a ramp afflux traffic control problem as a nonlinear optimal control problem; and solving the optimal control problem to obtain the optimal entry rate of the ramp vehicle of each road section. According to the method and system, the estimated total possible accident number and total consumed time are introduced into the target function, the optimal ramp vehicle entry rate of each road section is solved, the traffic accident risk is reduced, and the traffic efficiency of a ramp afflux area is improved.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic systems, and in particular relates to a ramp-in traffic control method and system based on the estimation of the number of traffic accidents. Background technique [0002] The ramp-in area has always been an area where traffic accidents and congestion occur frequently. The influx of on-ramp vehicles causes a surge in cross-sectional traffic flow on mainline roads, often causing large-scale congestion in the influx area. In addition, due to the high density of vehicles in the area and the close interaction between vehicles, it is easy to cause traffic accidents. At present, with the rapid development of intelligent transportation system technology, it is the main development trend to use intelligent roadside equipment to build an intelligent transportation system to regulate traffic conditions. [0003] Some studies have proposed some effective solutions to the ramp-in problem. China...

Claims

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Application Information

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IPC IPC(8): G08G1/07G08G1/08G08G1/01
CPCG08G1/075G08G1/08G08G1/0129
Inventor 刘津强赵万忠董坤邹松春王春燕吴刚高犇张森皓梁为何徐坤豪张从余
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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