Diagnosing Chronic Errors in Freeway Loop Detectors from Existing Field Hardware

In an effort to improve the quality of loop detector data, this research developed algorithms to automatically identify two types of detector errors that are difficult to diagnose in the field: splashover, the false detection in one lane of a vehicle from an adjacent lane; and pulse breakup, when a single vehicle produces two or more pulses in its lane of travel. The present work is likely applicable to emerging detectors seeking to replace loop detectors using wayside mounted sensors. Most of these detectors emulate the operation of loop detectors; while the mechanism of splashover and pulse breakup differs across the different detection technologies, its manifestation should be similar in the vehicle actuations.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 143p

Subject/Index Terms

Filing Info

  • Accession Number: 01359031
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Contract Numbers: IA 65A0231
  • Files: CALTRANS, TRIS, STATEDOT
  • Created Date: Nov 30 2011 12:11PM