Dynamic Wavelet Neural Network Model for Traffic Flow Forecasting
Publication: Journal of Transportation Engineering
Volume 131, Issue 10
Abstract
Accurate and timely forecasting of traffic flow is of paramount importance for effective management of traffic congestion in intelligent transportation systems. In this paper, a novel nonparametric dynamic time-delay recurrent wavelet neural network model is presented for forecasting traffic flow. The model incorporates the self-similar, singular, and fractal properties discovered in the traffic flow. The concept of wavelet frame is introduced and exploited in the model to provide flexibility in the design of wavelets and to add extra features such as adaptable translation parameters desirable in traffic flow forecasting. The statistical autocorrelation function is used for selection of the optimum input dimension of traffic flow time series. The model incorporates both the time of the day and the day of the week of the prediction time. As such, it can be used for long-term traffic flow forecasting in addition to short-term forecasting. The model has been validated using actual freeway traffic flow data. The model can assist traffic engineers and highway agencies to create effective traffic management plans for alleviating freeway congestions.
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Acknowledgment
The assistance of Mr. Randy Perry of North Carolina Department of Transportation in obtaining traffic data for training and testing the new traffic flow forecasting model is greatly appreciated.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 131 • Issue 10 • October 2005
Pages: 771 - 779
Copyright
© 2005 ASCE.
History
Received: Mar 23, 2004
Accepted: Jan 14, 2005
Published online: Oct 1, 2005
Published in print: Oct 2005
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