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Vehicle trajectory optimization method for conflict elimination of main line entrance ramp confluence area

A technology of vehicle trajectory and optimization method, applied in the direction of traffic flow detection, combustion engine, internal combustion piston engine, etc., can solve the problems of lack, unfavorable confluence conflict, complex computing ability, etc., to achieve the effect of conflict elimination

Active Publication Date: 2022-08-05
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

However, the existing method is based on the optimal control based on the principle of interspersed gaps, and this principle is a probability value problem, and its actual application effect will vary greatly with different road layouts and driving environments. Can belong to the merging security under high probability, and cannot completely eliminate the merging conflict problem
In addition, the previous design method allows vehicles to perform merging operations in the entire acceleration lane. This requires more large and complex computing power when the number of vehicles increases and the traffic layout becomes more complex, which is also unfavorable for the elimination of merging conflicts.
[0009]Existing control methods cannot completely eliminate the problem of merging conflicts of vehicles on the on-ramp of urban expressways, and lack of improvement in the merging area of ​​on-ramps on urban expressways under the premise of ensuring intrinsic safety A more scientific and reasonable control method for efficiency

Method used

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  • Vehicle trajectory optimization method for conflict elimination of main line entrance ramp confluence area
  • Vehicle trajectory optimization method for conflict elimination of main line entrance ramp confluence area
  • Vehicle trajectory optimization method for conflict elimination of main line entrance ramp confluence area

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Embodiment 1

[0065] The geometric conditions of the scene in Embodiment 1 of the present invention are as follows figure 2 As shown, the expressway main line is set with an outermost lane, the ramp is normally connected, and the ramp vehicle is set as one vehicle, using the method in the present invention, with the maximum average speed of all vehicles as the optimization goal, the speed trajectory of the vehicle is controlled, and with the The general vehicle merging methods are compared. The design input parameters are: Δt, the unit time interval of system operation, which is 0.5s; T mer , the total running time of the system, take 30s; x mer , the longitudinal length of the ramp confluence functional area, taken as 50m; The initial coordinate position of the expressway main line vehicle, take -40, -80, -120, -160, -200; The initial coordinate position of the ramp vehicle, take -100; N, the number of vehicles on the main line of the expressway, take 5veh; v max , the maximum speed...

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Abstract

The invention provides a vehicle trajectory optimization method for conflict elimination of a main line entrance ramp confluence area, and the method comprises the steps: building a vehicle confluence optimization control model for the confluence conflict of an expressway entrance ramp, and improving the passing efficiency of the expressway confluence area on the basis of guaranteeing the elimination of the confluence conflict; according to the optimization control method, a linear programming model is adopted for description, the maximum average running speed of a whole vehicle is taken as an optimization target, and main line and ramp traffic flows are constructed in a unified optimization framework, so that the overall traffic efficiency of a confluence area is improved; in consideration of vehicle constraint, safety constraint and confluence constraint conditions, ramp vehicles and mainline vehicles are completely separated in time and space, so that conflicts are eliminated.

Description

technical field [0001] The invention belongs to the technical field of vehicle trajectory optimization methods, and in particular relates to a vehicle trajectory optimization method for conflict elimination in a main line on-ramp merge area. Background technique [0002] The on-ramp merging area of ​​urban expressway is an important conflict point and bottleneck area of ​​urban road traffic. In order to alleviate the conflict and improve the operation level of expressway traffic, a vehicle control method based on networked vehicle information transmission technology is proposed. The existing methods are mainly based on the principle of traversable gap for optimal control. However, since the traversable gap is a probability value, different drivers understand it differently, so it can only achieve the safety of confluence under a high probability, and cannot completely eliminate conflicts. For the conflict elimination of the expressway on-ramp merge area, there is no targeted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01
CPCG08G1/01G08G1/0104G08G1/0108G08G1/0125Y02T10/40
Inventor 赵靖戚钧杰章程王嘉文马晓旦江洪尹富秋侯剑锋张范磊
Owner UNIV OF SHANGHAI FOR SCI & TECH
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