INDIVIDUAL VEHICLE SPEED ESTIMATION USING SINGLE LOOP INDUCTIVE WAVEFORMS

Travel time is the reciprocal of speed and is a useful measure of road congestion and traffic system performance. Travel time is also a basic traffic variable that is used in many intelligent transportation system strategies such as route guidance, incident detection, and traveler information systems. Previously, speeds were mainly acquired from double inductive loops configured as speed traps, because single loop speed estimates based on assumptions of a constant vehicle length were inaccurate. However, more accurate measurements of speed can now be accomplished with single loops by utilizing inductive waveforms of vehicles that are output from newer detector cards. An algorithm using signal processing and statistical methods was developed to extract speeds from inductive waveforms. The results show that the proposed algorithm performs better than conventional single loop estimation methods. The results also show that the algorithm is robust under different traffic conditions and is transferrable across surveillance sites without the need for recalibration. The use of the extensive single loop surveillance infrastructure is a cost-effective way of obtaining more accurate networkwide travel time information.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8674831
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Sun, Chao
  • Ritchie, S G
• Publication Date: 1999-11

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 531-538
• Serial:
  • Journal of Transportation Engineering
  • Volume: 125
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-947X
  • Serial URL: https://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Advanced traveler information systems; Algorithms; Data collection; Estimating; Incident detection; Intelligent transportation systems; Linear regression analysis; Loop detectors; Mathematical models; Motor vehicles; Route guidance; Signal processing; Statistical analysis; Traffic congestion; Traffic speed; Travel time; Waveform analysis
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Planning and Forecasting; Public Transportation; I71: Traffic Theory; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00778224
• Record Type: Publication
• Files: TRIS, ATRI
• Created Date: Nov 29 1999 12:00AM