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

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...

AI Technical Summary

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

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