Expressway entrance ramp cooperative control method and device for emergency evacuation scene

Abstract

The invention discloses an expressway entrance ramp cooperative control method and device for an emergency evacuation scene. The method comprises the steps of acquiring the average vehicle speed, flow and traffic flow density in a current sampling period, acquiring a pre-established traffic flow prediction model, and based on the traffic flow prediction model, in combination with a pre-established objective function and constraint conditions of a finite time domain optimization problem, executing an optimization operation of a prediction time domain to obtain an optimal control sequence, wherein the target function is constructed based on queuing waiting time of vehicles on a ramp road section, passing time of vehicles on a main road section and an evacuation risk occurrence probability, and generating a traffic control signal based on the first control quantity in the optimal control sequence so as to perform traffic control on the expressway entrance ramp, meanwhile, entering the next sampling period, and repeating the steps until sampling is completed. The areas with different evacuation risks can be controlled differently, so that the emptying time of the area with larger risk is shortened.

Description

technical field [0001] The present invention relates to the technical field of traffic data processing, in particular to a collaborative control method and device for expressway entrance ramps facing emergency evacuation scenarios. Background technique [0002] With the acceleration of urbanization and the rapid increase of car ownership, urban traffic congestion is becoming more and more serious, and the construction and control of expressways have attracted widespread attention. In recent years, many scholars have proposed strategies such as ramp control, variable speed limit control, and coordination of multiple controls in terms of control strategies. Research on traffic control has also made a series of progress and results in solving urban traffic congestion problems. [0003] However, the traffic control strategies proposed for traffic congestion are not universal. Under normal circumstances, the traffic flow of the expressway ramp system has both in and out, maintai...

AI Technical Summary

Problems solved by technology

[0004] This invention solves the problem that the traditional traffic control strategy for traffic congestion cannot effectively solve the traffic control problem in the emergency evacuation scene

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