Single-lane cellular automaton model simulation method considering acceleration continuity

Abstract

The invention discloses a single-lane cellular automaton model simulation method considering acceleration continuity, and provides a novel cellular automaton simulation model. The relationship between vehicle acceleration and the current speed of a vehicle, the maximum speed of the vehicle, the current speed of a front vehicle and the gap in front of the vehicle is comprehensively considered on the basis of refining the length of a road cell, the possible speed and acceleration of the vehicle are refined, it is guaranteed that the acceleration does not jump in time, and a single-lane simulation model with continuous acceleration is achieved in the cellular automaton for the first time. The method can solve the problem that the acceleration and the previous moment are uncorrelated and discontinuous when the cellular automaton model is used for researching the vehicle updating process, and has important research value for simulating the road traffic flow by using the cellular automaton model.

Description

technical field [0001] The invention belongs to the technical field of traffic engineering, and in particular relates to a single-lane cellular automaton model simulation method considering continuous acceleration. Background technique [0002] Cellular automaton has the characteristics of simple and efficient simulation of road traffic flow; however, due to the discretization of space and time in the cellular automata model, the vehicle is always jumping in the process of updating speed and position, which cannot be well It reflects the characteristics of traffic flow when vehicles change continuously. Researchers generally use the method of refining the road cell space and simulation step size to optimize the cellular automata model; The acceleration is often set as a fixed value, or it is only judged whether the vehicle chooses to accelerate according to the vehicle driving space. The vehicle acceleration in the next simulation step has nothing to do with the previous si...

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Problems solved by technology

[0002] Cellular automaton has the characteristics of simple and efficient simulation of road traffic flow; however, due to the discretization of space and time in the cellular automata model, the vehicle is always jumping in the process of updating speed and position, which cannot be well Reflect the traffic flow characteristics when the vehicle changes continuously

Researchers generally use the method of refining the road cell space and simulation step size to optimize the cellular automata model; The acceleration is often set as a fixed value, or it is only judged whether the vehicle chooses to accelerate according to the vehicle driving space. The vehicle acceleration in the next simulation step has nothing to do with the previous simulation step; The acceleration at this moment is changed on the basis of the acceleration at this moment; and the acceleration of the vehicle should be continuously changing in time, and the jump is not strong. The existing cellular automaton model is consistent with the actual vehicle running There is a difference in acceleration

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