A collaborative control method of expressway and multi-ramp based on vehicle group accident risk
A technology of accident risk and collaborative control, which is applied to road vehicle traffic control systems, traffic control systems, instruments, etc., can solve problems such as failure to consider safety parameters, accident risk transfer, and inability to better utilize the benefits of strategies to achieve Effects of preventing re-elevation, increasing flexibility, and improving traffic safety
Active Publication Date: 2022-08-09
TONGJI UNIV
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Problems solved by technology
The commonly used ramp control algorithm ALINEA algorithm does not consider safety parameters, and the ALINEA algorithm still needs to be improved
Moreover, the current ramp control methods are more single-point, but the single-point implementation of the control strategy may transfer the accident risk from the upstream to the downstream; and the single-point implementation of the strategy control may not be able to better play the benefits of the strategy
Method used
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Embodiment
[0058] like figure 1 As shown in the figure, a method for collaborative control of expressways and multi-ramps based on vehicle group accident risk specifically includes the following steps:
[0059] S1. Obtain the control step size of the vehicle group, calculate the accident risk index of the vehicle group in each control step size, and determine whether the accident risk index is greater than a preset threshold value, and if so, go to step S2, otherwise continue monitoring;
[0060] S2. Determine the ramp that needs to be controlled, and obtain the start time of the ramp for ramp control;
[0061] S3. According to the METANET ramp entry model and the ALINEA algorithm based on safety factors, respectively calculate the adjustment rate of each ramp that needs to be controlled, and take the smaller value of the two calculated adjustment rates as the final ramp adjustment rate;
[0062] S4. Obtain the ramp control period of the ramp, and calculate the green light time of the r...
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The invention relates to an expressway multi-ramp collaborative control method based on vehicle group accident risk, comprising: S1, obtaining a control step size of a vehicle group, calculating an accident risk index in each control step size, and judging whether it is greater than a preset threshold, If go to step S2, otherwise continue monitoring; S2, determine the ramp that needs to be controlled, and obtain the start time of ramp control; S3, calculate the ramp adjustment rate according to the METANET ramp merge model and the ALINEA algorithm based on safety factors, and take The smaller value of the two is used as the final ramp adjustment rate; S4, obtain the ramp control period, and calculate the green light time of the ramp in combination with the ramp adjustment rate; S5, obtain the vehicle queuing length on the ramp, and adjust the green light time to obtain the next The green time of the ramp for a period of time. Compared with the prior art, the invention has the advantages of reducing the accident risk of vehicle groups, improving traffic safety, implementing control on multiple ramps, and avoiding the transfer of vehicle groups with high accident risk from upstream to downstream.
Description
technical field [0001] The invention relates to the field of expressway traffic safety control, in particular to a coordinated control method of expressway multi-ramp based on vehicle group accident risk. Background technique [0002] Expressways are the backbone of urban traffic. They have the characteristics of large traffic volume, fast speed, and closedness. They mainly serve long-distance travel in cities. During the morning and evening rush hours, the traffic volume is large, and there are frequent acceleration and deceleration, merging and other phenomena, which are serious. Affect driving safety. If an accident occurs on an expressway, due to its fast speed and relatively closed characteristics, it will be difficult to handle the accident, and even cause traffic congestion and serious spread, affecting the ramp and the traffic flow on the ground. Therefore, it is necessary to control the traffic flow on expressways in advance based on the accident risk. One of the ...
Claims
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IPC IPC(8): G08G1/081G08G1/16
CPCG08G1/081G08G1/167Y02A30/60
Inventor 马万经赫子亮王玲俞春辉
Owner TONGJI UNIV