The Use of Uncalibrated Roadside CCTV Cameras to Estimate Mean Traffic Speed

Details

• Alternative Title:
  Final Research Report: CCTV Cameras as Quantitative Speed Sensors: T1803-21 Uncalibrated CCTV Cover alternate title
• Creators:
  Dailey, Daniel J. ; Cathey, Frederick W. ; Pumrin, Suree
• Corporate Creators:
  Washington State Transportation Center ; University of Washington. Dept. of Electrical Engineering
• Corporate Contributors:
  Washington State Transportation Commission ; Transportation Northwest Regional Center X (TransNow) (UTC) ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; Washington (State). Department of Transportation
• Subject/TRT Terms:
  • Speed limits
  • Traffic safety
  • Video imaging detectors
  • Calibration
  • Cameras
  • Speed detectors
  • Speeding
  • Geometric elements
  • Vehicle length distribution
  • Video image processing
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington
• Corporate Publisher:
  Washington State Transportation Center
• Abstract:
  In this report, we present a novel approach for estimating traffic speed using a sequence of images from an un-calibrated camera. We assert that exact calibration is not necessary to estimate speed. Instead, to estimate speed, we use: (1) geometric relationships inherently available in the image, (2) some common sense assumptions that reduce the problem to a 1-D geometry, (3) frame differencing to isolate moving edges and track vehicles between frames, and ; (4) parameters from the distribution of vehicle lengths.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/14762/dot_14762_DS1.pdf
• File Type:
  [PDF - 437.94 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:ed1998855f8f31461364b5c915af8ad89f26b44742b6aad7c3b89024db8ed3bd