Modeling Urban Link Travel Time with Inductive Loop Detector Data by Using the k-NN Method

The need to measure urban link travel time (ULTT) is becoming increasingly important for network management and traveler information provision. This paper proposes the use of the k nearest neighbors (k-NN) technique to estimate ULTT with the use of single loop inductive loop detector (ILD) data. Real-world data from London is used. This paper explores the sensitivity of travel time estimates to various k-NN design parameters. It finds that the k-NN method is not particularly sensitive to the distance metric, although care must be taken in selecting the right combination of local estimation method (LEM) and value of k. A robust LEM should be used. The optimized k-NN model is found to provide more accurate estimates than other ULTT methods. To obtain a more accurate estimate of ULTT, a potential application of this approach could be to aggregate GPS probe vehicle ULTT records from different times but the same underlying travel time distribution.

• Record URL:
  https://doi.org/10.3141/1935-06
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Modeling+Urban+Link+Travel+Time+with+Inductive+Loop+Detector+Data+by+Using+the+k-NN+Method&author=S.+Robinson&author=J.+Polak&publication_year=2005
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/155479.aspx
• Authors:
  • Robinson, Steve
  • Polak, John W
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 47-56
• Monograph Title: Information Systems and Technology
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1935
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Loop detectors; Methodology; Traffic data
• Uncontrolled Terms: Urban link travel time models
• Geographic Terms: London (England)
• Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01023226
• Record Type: Publication
• ISBN: 0309094097
• Files: TRIS, TRB, ATRI
• Created Date: Apr 24 2006 1:01PM