RECOGNITION OF RETROREFLECTIVE ROAD SIGNS DURING NIGHT DRIVING

Temporal waveforms of the illumination at the driver eyes position were determined in various night traffic and weather conditions. The statistics of retinal illumination were analyzed and a computer controlled technique was developed to simulate similar changes of eye illumination. The participant fixated on retroreflective optical stimuli at a distance of 5 m. The participant was then subjected to a dazzle and recovery from the glare. The background illumination was in the mesopic range. Experiments showed that at background illumination 0.1 Lx no dazzling took place in case of correctly installed clean headlights. The participant was dazzled if the high beam lamps were incorrectly aligned or cycloplegia was used for pupil dilation. The dazzle time depended on the background illumination level and could increase to three seconds for the illumination changes corresponding to the equivalent speed of vehicles 50 km/h.

• Supplemental Notes:
  • This article is from ADA412433 Europe Chapter of the Human Factors and Ergonomics Society Meeting.
• Corporate Authors:

  Latvia University

  Department of Optometry and Vision Science
  Riga,   Latvia 
• Authors:
  • Berzinsh, J
  • Ozolinsh, M
  • Cikmac, P
  • Pesudovs, K
• Publication Date: 2002-9-12

Language

• English

Media Info

• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Illuminated traffic signs; Night vision; Retroreflection; Signs; Waveform analysis; Weather conditions
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 00961041
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 21 2003 12:00AM