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• W2090880284 abstract "A Gaussian approximation of the stochastic traffic flow model of Jabari and Liu (2012) is proposed. The Gaussian approximation is characterized by deterministic mean and covariance dynamics; the mean dynamics are those of the Godunov scheme. By deriving the Gaussian model, as opposed to assuming Gaussian noise arbitrarily, covariance matrices of traffic variables follow from the physics of traffic flow and can be computed using only few parameters, regardless of system size or how finely the system is discretized. Stationary behavior of the covariance dynamics is analyzed and it is shown that the covariance matrices are bounded. Consequently, Kalman filters that use the proposed model are stochastically observable, which is a critical issue in real time estimation of traffic dynamics. Model validation was carried out in a real-world signalized arterial setting, where cycle-by-cycle maximum queue sizes were estimated using the Gaussian model as a description of state dynamics. The estimated queue sizes were compared to observed maximum queue sizes and the results indicate very good agreement between estimated and observed queue sizes." @default.
• W2090880284 created "2016-06-24" @default.
• W2090880284 creator A5061466757 @default.
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• W2090880284 date "2013-01-01" @default.
• W2090880284 modified "2023-10-16" @default.
• W2090880284 title "A stochastic model of traffic flow: Gaussian approximation and estimation" @default.
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• W2090880284 doi "https://doi.org/10.1016/j.trb.2012.09.004" @default.
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