Real-Time Estimation of Arterial Travel Times with Spatial Travel Time Covariance Relationships

This paper investigates the use of real-time automatic vehicle identification (AVI) data and an offline travel time database for real-time estimation of arterial travel times in Hong Kong, China. The offline database consists of average link travel times and spatial link travel time covariance matrices by time of day, day of week, and week of month. Three-month historical travel time estimates and real-time AVI data are adopted for calibration and updating of the spatial covariance relationships of link travel times on Hong Kong arterial roads. A case study has been carried out on a selected path in a Hong Kong urban area to evaluate the performance of three alternative methods for real-time estimation of arterial travel times: fixed offline database (Method 1), continuously updated offline database (Method 2), and continuously updated offline database generated by the nonparametric regression method (Method 3). The validation results show that the travel time estimation errors of Methods 2 and 3 are significantly reduced when compared with those using the fixed offline database.

• Record URL:
  https://doi.org/10.3141/2121-11
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Real-Time+Estimation+of+Arterial+Travel+Times+with+Spatial+Travel+Time+Covariance+Relationships&author=K.+Chan&author=W.+Lam&author=M.+Tam&publication_year=2009
• Availability:
  • Find a library where document is available. Order URL: http://trb.org/Main/Blurbs/Data_Systems_and_Travel_Survey_Methods_2009_162816.asp
• Authors:
  • Chan, K S
  • Lam, William H K
  • Tam, Mei Lam
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 102-109
• Monograph Title: Data Systems and Travel Survey Methods 2009
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2121
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Arterial highways; Automatic vehicle identification; Case studies; Covariance; Estimating; Real time information; Travel time
• Uncontrolled Terms: Link travel time
• Geographic Terms: Hong Kong (China)
• Subject Areas: Data and Information Technology; Highways; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01137470
• Record Type: Publication
• ISBN: 9780309126380
• Report/Paper Numbers: 09-2453
• Files: TRIS, TRB, ATRI
• Created Date: Jul 31 2009 8:47AM