Proposed Test Protocol for Video Imaging Detection at Intersection Stop Lines

Test protocols for non-loop detectors have often required comparing the performance attributes of these detectors with those of loops or other point detectors, or to manual counts. However, that comparison is not always appropriate for a variety of reasons, and it does not provide all of the critical information needed to make acceptance or rejection decisions. In the case of video image vehicle detection systems (VIVDS), comparison with loops (i.e., simple count comparisons) provides only a limited glimpse on performance since the two systems have different perspectives on approaching vehicles. In all cases except those in which cameras are oriented vertically downward, cameras and loops or other pavement-based detectors detect vehicles at different points. Also, for VIVDS, factors such as the “aspect ratio” (ratio of horizontal distance to detection zones divided by the camera height) vary significantly, and these variables significantly impact the accuracy of camera-processor systems. The purpose of this document is to report on the development of a proposed concept for a VIVDS test protocol.

• Record URL:
  http://tti.tamu.edu/documents/0-6030-P2.pdf
• 
• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 3135 TAMU
  College Station, TX  United States  77843-3135

  Texas Department of Transportation

  Greer Highway Building, 125 East 11th Street
  Austin, TX  United States  78701-2483

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Middleton, Dan
  • Longmire, Ryan
  • Bullock, Darcy M
  • Charara, Hassan
  • Bullock, Darcy
• Publication Date: 2010-8

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: 30p

Subject/Index Terms

• TRT Terms: Evaluation and assessment; Intersections; Video imaging detectors
• Uncontrolled Terms: Stop lines; Test protocols
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01226612
• Record Type: Publication
• Files: TRIS, USDOT, STATEDOT
• Created Date: Nov 18 2010 11:49AM