منابع مشابه
Density Fluctuations in Traffic Flow
Density fluctuations in traffic current are studied by computer simulations using the deterministic coupled map lattice model on a closed single-lane circuit. By calculating a power spectral density of temporal density fluctuations at a local section, we find a power-law behavior, ∼ 1/f, on the frequency f , in non-congested flow phase. The distribution of the headway distance h also shows the ...
متن کاملSelf-sustained nonlinear waves in traffic flow.
In analogy to gas-dynamical detonation waves, which consist of a shock with an attached exothermic reaction zone, we consider herein nonlinear traveling wave solutions to the hyperbolic ("inviscid") continuum traffic equations. Generic existence criteria are examined in the context of the Lax entropy conditions. Our analysis naturally precludes traveling wave solutions for which the shocks trav...
متن کاملDensity waves and jamming transition in cellular automaton models for traffic flow
In this paper computer simulation results of higher-order density correlations for cellular automaton models of traffic flow are presented. The examinations show the jamming transition as a function of both the density and the magnitude of noise and allow one to calculate the velocity of upstream moving jams. This velocity is independent of the density and decreases with growing noise. The poin...
متن کاملTraffic Condition Detection in Freeway by using Autocorrelation of Density and Flow
Traffic conditions vary over time, and therefore, traffic behavior should be modeled as a stochastic process. In this study, a probabilistic approach utilizing Autocorrelation is proposed to model the stochastic variation of traffic conditions, and subsequently, predict the traffic conditions. Using autocorrelation of the time series samples of density and flow which are collected from segments...
متن کاملDensity waves and 1/f density fluctuations in granular flow.
We simulate the granular flow in a narrow pipe with a lattice–gas automaton model. We find that the density in the system is characterized by two features. One is that spontaneous density waves propagate through the system with well–defined shapes and velocities. The other is that density waves are so distributed to make the power spectra of density fluctuations as 1/fα noise. Three important p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2000
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.61.3564