RESULTS OF THE TRISTAR A.I.D SYSTEM OBTAINED FROM 3 FIELD EXPERIMENTATIONS

Tristar is an automatic incident detection system based on image processing techniques (and also known as the local module of the INVAID system). 5 images per second are recorded and any vehicle stopping longer than a defined period represents an incident. Trials of the system were carried out on the A8 near Nice, the A43 near Lyon and on the Antwerp Ring in Belgium. Each site is described and the measurements taken listed. Technical aspects evaluated included: a) detection rate, b) false alarm rate, c) false alarm frequency and d) mean time to detect. The results are analysed and the sites compared. The results show a detection rate of 84-91%, false alarm rate of 6- 13%, false alarm frequency of 0.02-0.26 per day and a mean time to detect of 15 seconds. A number of recommendations are made regarding camera siting. For the covering abstract see IRRD 865401.

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 168-71

Subject/Index Terms

Filing Info

  • Accession Number: 00668598
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Nov 16 1994 12:00AM