WAVELET PACKET-AUTOCORRELATION FUNCTION METHOD FOR TRAFFIC FLOW PATTERN ANALYSIS

Accurate, timely forecasting of traffic flow is of key importance in effective management of traffic congestion in intelligent transportation systems. A detailed understanding of properties of traffic flow is essential for building a reliable forecasting model. The discrete wavelet packet transform (DWPT) provides more coefficients than the conventional discrete wavelet transform (DWT), representing additional subtle details of a signal. In wavelet multiresolution analysis, an important decision is the selection of the decomposition level. This paper proposes a statistical autocorrelation function (ACF) for the selection of the decomposition level in wavelet multiresolution analysis of traffic flow time series. A hybrid wavelet packet-ACF method is proposed for analysis of traffic flow time series and determining its self-similar, singular, and fractal properties. A DWPT-based approach combined with a wavelet coefficients penalization scheme and soft thresholding is presented for denoising the traffic flow. The proposed methodology provides a powerful tool in removing the noise and identifying singularities in the traffic flow. The methods created in this work are of value in developing accurate traffic-forecasting models.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10939687
• Corporate Authors:

  Blackwell Publishing

  350 Main Street
  Malden, MA  United States  02148
• Authors:
  • Jiang, X H
  • Adeli, H
• Publication Date: 2004-9

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 324-337
• Serial:
  • Computer-Aided Civil and Infrastructure Engineering
  • Volume: 19
  • Issue Number: 5
  • Publisher: Blackwell Publishing
  • ISSN: 1093-9687
  • Serial URL: http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1467-8667

Subject/Index Terms

• TRT Terms: Autocorrelation; Discrete systems; Intelligent transportation systems; Time series; Traffic congestion; Traffic distribution; Traffic flow theory; Traffic forecasting; Traffic models; Travel patterns; Wavelets
• Uncontrolled Terms: Singularities
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory; I73: Traffic Control;

Filing Info

• Accession Number: 00975320
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 25 2004 12:00AM